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2013 Chevrolet Silverado 1500

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2013 Chevrolet Silverado 1500 do not stand out strongly from the model-year median of 525.

About this comparison →

When problems were reported

Mileage at the reported incident

170 reports with mileage · 131 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Air Bags. Review the 83 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Structure. Review the 75 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 33 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

8 crash reports0 fire reports4 injury reports

Structure complaints

75 reports
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Mileage unknown · Jan 23, 2023
Structure

Chevrolet Silverado rusted out frame safety issue

NHTSA ODI #11503254

Mileage unknown · Dec 6, 2022
StructureCrash

The vehicle is unsafe to operate around pedestrians and other roadside objects because of the poor visibility, especially at critical moments where visual confirmation is needed like crosswalks, intersections, and parking lots. The A pillars, side mirrors, and tall front profile, block the driver from visually confirming hazards…

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The vehicle is unsafe to operate around pedestrians and other roadside objects because of the poor visibility, especially at critical moments where visual confirmation is needed like crosswalks, intersections, and parking lots. The A pillars, side mirrors, and tall front profile, block the driver from visually confirming hazards and pedestrians at crosswalks and intersections. While driving, I made a right hand turn and attempted to park roadside. The vehicle was blocking my view of cement barriers placed in the parking space before mine, and the vehicle collided with the barriers. Also, many times I have had to stop just after entering an intersection to keep from hitting a pedestrian, because the vehicle blocked my view.

NHTSA ODI #11496315

70,000 miles · Sep 12, 2022
StructureSuspension

The contact owns a 2013 Chevrolet Silverado 1500. The contact stated that upon taking the vehicle to the local dealer for servicing, he was informed that the subframe of the vehicle was severely corroded and all cross members of the vehicle needed to be replaced. The vehicle was taken to an independent mechanic where the cross m…

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The contact owns a 2013 Chevrolet Silverado 1500. The contact stated that upon taking the vehicle to the local dealer for servicing, he was informed that the subframe of the vehicle was severely corroded and all cross members of the vehicle needed to be replaced. The vehicle was taken to an independent mechanic where the cross members were replaced and welded. However, the failure persisted. The contact stated that he could hear parts separating from the subframe and falling onto the ground while driving. The contact stated that upon inspecting the subframe, he noticed that unknown parts were corroded and had detached. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 70,000.

NHTSA ODI #11483977

Mileage unknown · Aug 28, 2022
Structure

Frame rusted and broke in 2 places!!!!!! 54,000 miles. No accident!!!!

NHTSA ODI #11481619

Mileage unknown · Dec 31, 2021
StructureSuspension

Frame already has holes from rust after only 8 years and was well kept and washed regularly. The vehicle also has about 85k miles

NHTSA ODI #11445700

100,000 miles · Nov 23, 2021
StructureSuspension

The contact owns a 2013 Chevrolet Silverado 1500. The contact had taken the vehicle to an independent mechanic who discovered significant corrosion on the rear subframe of the vehicle. The dealer was notified of the failure and informed him that they had never heard of such a failure with that model vehicle. The manufacturer had…

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The contact owns a 2013 Chevrolet Silverado 1500. The contact had taken the vehicle to an independent mechanic who discovered significant corrosion on the rear subframe of the vehicle. The dealer was notified of the failure and informed him that they had never heard of such a failure with that model vehicle. The manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 100,000.

NHTSA ODI #11441460

Mileage unknown · Nov 3, 2021
Structure

1/ PREMATURE RUST ALL OVER FRAME. FRAME RAIL IS ROTTED THRU AND WILL COLLAPSE IN AN ACCIDENT ALDO WILL NOT PASS A SAFTY INSPECTION . THIS TRUCK HAS APPROV. 70,000 MILES ON IT. THERE ARE AMNY THREADS ALL OVER TH INTERNET WITH OTHER PEOPLE WITH THIS PROBLEM.G M KNOWS ABOUT IT 2/ I HAVE NOT BROUGHT IT TO A DEALER BECAUSE I ALREADY …

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1/ PREMATURE RUST ALL OVER FRAME. FRAME RAIL IS ROTTED THRU AND WILL COLLAPSE IN AN ACCIDENT ALDO WILL NOT PASS A SAFTY INSPECTION . THIS TRUCK HAS APPROV. 70,000 MILES ON IT. THERE ARE AMNY THREADS ALL OVER TH INTERNET WITH OTHER PEOPLE WITH THIS PROBLEM.G M KNOWS ABOUT IT 2/ I HAVE NOT BROUGHT IT TO A DEALER BECAUSE I ALREADY KNOW WHAT THE ANSWER IS i HAVE HAD GM TRUCKS ALL OF MY LIFE ( IM 68) I HAVE NEVER HAD A FRAME ROT OUT. I DID SPEAK TO A FRIEND IN THE PARTS DEPARTMENT AT A DEALER AND HE KNEW ALL ABOUT THE PROBLEM AND TOLD ME HE HAS NO KNOWLEDGE THAT GM WILL RECALL THEM LIKE TOYATA DID YEARS AGO. I CAN'T EVEN TRADE IT IN BECAUSE THE DEALER ALREADY KNOWS THE FRAME WILL BE A PROBLEM AND GIVE ME NOTHING FOR A 28,000 TRUCK . I REALLY DON'T KNOW WHAT TO DO . THE DATE ON THE INCIDENT IS I BELIVE WHEN I PURCHASED IT . IT WAS RUSTING THEN . THE TRUCK IS TITLED TO MY BUSNESS PPD CORP 1489 MAIN STREET BROCKTON MA 02301. THANKS

NHTSA ODI #11439275

168,000 miles · Mar 20, 2021
Structure

PERSONAL MECHANIC NOTED ROTTING FRAME AREAS, TUBES BETWEEN MAIN FRAME SUPPORTING GAS TANK AND CONNECTING SHOCK ABSORBERS. METAL FABRICATING BUSINESS CONSULTED AND WHEN GAS TANK WAS REMOVED AND ENTIRE MAIN FRAME EXPOSED SEVERE RUSTING OF MAIN FRAME ON BOTH SIDES NOTED. APPEARS ENTIRE FRAME SHOULD BE REPLACED OR EXTENSIVE WELDIN…

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PERSONAL MECHANIC NOTED ROTTING FRAME AREAS, TUBES BETWEEN MAIN FRAME SUPPORTING GAS TANK AND CONNECTING SHOCK ABSORBERS. METAL FABRICATING BUSINESS CONSULTED AND WHEN GAS TANK WAS REMOVED AND ENTIRE MAIN FRAME EXPOSED SEVERE RUSTING OF MAIN FRAME ON BOTH SIDES NOTED. APPEARS ENTIRE FRAME SHOULD BE REPLACED OR EXTENSIVE WELDING OF NEW METAL ONTO EXISTING FRAME. THE REAR PASSENGER SHOCH BROKE OFF AND FELL ONTO THE HIGHWAY PRIOR TO THIS. THE GAS TANK WAS NEAR FALLING OFF TOO. SEE ATTACHED PICTURES.

NHTSA ODI #11403998

Mileage unknown · Jan 7, 2021
Exterior LightingStructure

IMY 2013 CHEVY Z21 HAS STARTED LEAKING SROUND THE LIGHT ON TOP AND BACK LIGHT ON THE HOOD OF THE TRUCK. I NOTICED WET SPOT ON BACK PART OF HEADLINER AND SOME MOLD IN THE AREA. I HAVE FOUND WHERE OTHER PEOPLE HAVE SAID THE SAME PROBLEM ON THEIR 2013 SILVERADO, I CAN'T FOUND ANY RECALLS ON THIS. I FEEL THERE NEEDS TIO BE A REC…

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IMY 2013 CHEVY Z21 HAS STARTED LEAKING SROUND THE LIGHT ON TOP AND BACK LIGHT ON THE HOOD OF THE TRUCK. I NOTICED WET SPOT ON BACK PART OF HEADLINER AND SOME MOLD IN THE AREA. I HAVE FOUND WHERE OTHER PEOPLE HAVE SAID THE SAME PROBLEM ON THEIR 2013 SILVERADO, I CAN'T FOUND ANY RECALLS ON THIS. I FEEL THERE NEEDS TIO BE A RECALL FROM WHAT I HAVE FOUND ABOUT THIS.. MY 3 YEAR OLD SON RIDES IN THE BACKSEAT RIGHT WHERE THE LEAK IS.AND I'M AFRAID IT COULD MAKE HIM SICK

NHTSA ODI #11387053

81,000 miles · Aug 30, 2020
Structure

THE DRIVER DOOR HANDLE (BOTH THE INTERIOR OR EXTERIOR HANDLES) WOULD NOT OPEN THE DOOR WHEN STOPPED. THE REPAIR SHOP SHOWED ME A SMALL POT METAL ARM THAT BROKE INSIDE THE DOOR PANEL AND CAUSED THE PROBLEM. WHILE NOT AN ISSUE BY ITSELF, IF THE AUTO WAS IN AN ACCIDENT, THIS WOULD NOT HAVE ALLOWED THE DRIVER TO EXIT THE VEHICLE, DE…

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THE DRIVER DOOR HANDLE (BOTH THE INTERIOR OR EXTERIOR HANDLES) WOULD NOT OPEN THE DOOR WHEN STOPPED. THE REPAIR SHOP SHOWED ME A SMALL POT METAL ARM THAT BROKE INSIDE THE DOOR PANEL AND CAUSED THE PROBLEM. WHILE NOT AN ISSUE BY ITSELF, IF THE AUTO WAS IN AN ACCIDENT, THIS WOULD NOT HAVE ALLOWED THE DRIVER TO EXIT THE VEHICLE, DEPENDING ON THE FINAL RESTING POSITION. FURTHER ADDING TO THIS IS THAT THE ISSUE APPEARED FOR A DAY, THEN THE DOOR WORKED FINE FOR 2 MORE DAYS BEFORE BECOMING PERMANENTLY NON-FUNCTIONING.

NHTSA ODI #11352133

Official recalls

2

21V053000 · Air Bags:frontal:passenger Side:inflator Module

Feb 5, 2021

General Motors, LLC (GM) is recalling certain 2013 Cadillac Escalade, Escalade ESV, and Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500/3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500/3500, Yukon, and Yukon XL vehicles originally sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands or "Zone A." Additionally, GM is recalling certain 2010 Cadillac Escalade, Escalade ESV, and Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500/3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500/3500, Yukon, and Yukon XL vehicles originally sold, or ever registered in the states of Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia or "Zone B." Additionally, GM is recalling certain 2009 Cadillac Escalade, Escalade ESV, and Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500/3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500/3500, Yukon, and Yukon XL vehicles originally sold, or ever registered, in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming or "Zone C."

Consequence & remedy

Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.

Remedy: GM will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. Interim letters notifying owners of the safety risk were mailed on February 24, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed on May 11, 2021. Owners may contact Cadillac customer service at 1-800-458-8006; Chevrolet customer service at 1-800-222-1020; and GMC customer service at 1-800-462-8782. GM's number for this recall is N212328790.

21V054000 · Air Bags:frontal:passenger Side:inflator Module

Feb 5, 2021

General Motors, LLC (GM) is recalling certain 2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, and Yukon XL vehicles originally sold, or ever registered, in the states of AL, CA, FL, GA, HI, LA, MS, SC, TX, PR, AS, GU, the MP, and VI or "Zone A." Additionally GM is recalling certain 2011-2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, Yukon XL and 2011-2013 Cadillac Escalade EXT, Chevrolet Avalanche, Silverado 1500, and GMC Sierra 1500 vehicles originally sold, or ever registered, in the states of AZ, AR, DE, DC, IL, IN, KS, KY, MD, MO, NE, NV, NJ, NM, NC, OH, OK, PA, TN, VA, and WV or "Zone B." Additionally, GM is recalling certain 2010-2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, and Yukon XL and 2010-2013 Cadillac Escalade EXT, Chevrolet Avalanche, Silverado 1500, and GMC Sierra 1500 vehicles originally sold, or ever registered, in the states of AK, CO, CT, ID, IA, ME, MA, MI, MN, MT, NH, NY, ND, OR, RI, SD, UT, VT, WA, WI, and WY or "Zone C." These vehicles are equipped with non-desiccated passenger frontal inflators containing phase-stabilized ammonium nitrate (PSAN) propellant. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.

Consequence & remedy

Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.

Remedy: GM will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. Interim letters notifying owners of the safety risk were mailed on February 25, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed to 40 VIN owners on May 11, 2021. A second owner notification letter was mailed to all other owners on January 24, 2022. Owners may contact Chevrolet customer service at 1-800-222-1020; Cadillac customer service at 1-800-458-8006; and GMC customer service at 1-800-462-8782. GM's number for this recall is N212328800.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

2

DP22005 · Pedestrian Alert Sounds

Opened Jan 27, 2023 · Closed Aug 7, 2023

Status: closed (inferred from source dates) · Electrical System:propulsion System

NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, NHTSA opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified NHTSA he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by NHTSA regarding the subject matter of the petition.

EA21002 · Desiccated Air Bag Inflator Rupture

Opened Sep 17, 2021 · No close date supplied

Status: open (inferred from source dates) · Air Bags:frontal:driver Side:inflator Module; Air Bags:frontal:passenger Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.

Additional source detail variants (2)

Air Bags:frontal:driver Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.

Air Bags:frontal:passenger Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.