IllustrationROTTING BRAKE LINES IN THE VEHICLE LISTED ABOVE, NOTICED BRAKE FLUID LEAKING FROM LINES. CORROSION SO BAD REQUIRES ALL LINES TO BE REPLACED. DEALER ALSO DAMAGED BRAKE CONTROLLER DURING REPAIR AND CHARGED ME THE REPLACEMENT COST. *TR
2003 Chevrolet Avalanche 1500
Owner reports · Recalls · Investigations
More warning signs than most Avalanche 1500 years
Owner complaints for the 2003 Chevrolet Avalanche 1500 are substantially higher than the model-year median of 38.
About this comparison →How this year compares
Owner complaints by model year
Compare all Avalanche 1500 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
70–25K
1525–50K
3650–75K
3775–100K
39100–150K
20150K+
154 reports with mileage · 28 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.
- Electrical System. Review the 84 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 28 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes, Hydraulic. Review the 24 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
5 crash reports3 fire reports2 injury reports
What owners actually said
182 reportsPULLING OUT OF PARKING LOT AND WHEN MERGING INTO TRAFFIC I PRESSED ON THE BRAKE PEDAL AND IT WENT COMPLETELY TO THE FLOOR WITHOUT ANY BRAKING ACTION. THE PEDAL CAME BACK UP TO NORMAL POSITION AND I PRESSED IT AGAIN HARDER THE SECOND TIME WHILE SIMULTANEOUSLY SHIFTING INTO FIRST GEAR. THE PEDAL WENT TO THE FLOOR AGAIN BUT LOCKE…
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PULLING OUT OF PARKING LOT AND WHEN MERGING INTO TRAFFIC I PRESSED ON THE BRAKE PEDAL AND IT WENT COMPLETELY TO THE FLOOR WITHOUT ANY BRAKING ACTION. THE PEDAL CAME BACK UP TO NORMAL POSITION AND I PRESSED IT AGAIN HARDER THE SECOND TIME WHILE SIMULTANEOUSLY SHIFTING INTO FIRST GEAR. THE PEDAL WENT TO THE FLOOR AGAIN BUT LOCKED UP THE WHEELS AND THE VEHICLE GRADUALLY CAME TO A STOP.
BRAKE LINE EXPLOSIVE FAILURE BEFORE THE FIREWALL. 95% LOSS OF STOPPING POWER. INSPECTION OF LINES INDICATES CORROSION. ALSO HEAVY CORROSION ON FRAME MEMBERS NOTED. THIS VEHICLE HAS BEEN IN THE CHEVY DEALERSHIP SEVERAL TIMES FOR CORROSION OF THE BRAKE ROTORS. AT 25000 MI. REPLACED ALL ROTORS AND PADS WITH NON CHEVY PARTS. NO MO…
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BRAKE LINE EXPLOSIVE FAILURE BEFORE THE FIREWALL. 95% LOSS OF STOPPING POWER. INSPECTION OF LINES INDICATES CORROSION. ALSO HEAVY CORROSION ON FRAME MEMBERS NOTED. THIS VEHICLE HAS BEEN IN THE CHEVY DEALERSHIP SEVERAL TIMES FOR CORROSION OF THE BRAKE ROTORS. AT 25000 MI. REPLACED ALL ROTORS AND PADS WITH NON CHEVY PARTS. NO MORE ROTOR ISSUES. NOW ALL BRAKE LINES CHANGED DUE TO CORROSION AND BURST LINE HAS CAUSED A MASTER CYLINDER FAILURE. THERE ARE SERIOUS SAFETY ISSUES HERE AND IT'S TIME FOR NHTSA TO STEP IN. *TR
I PURCHASED A USED AS-IS 2003 CHEVY AVALANCHE 1500 AND I DIDN'T NOTICE UNTIL A COUPLE OF HOURS LATER THAT THE SPEEDOMETER WASN'T WORKING. I DON'T WHEN IT FAILED. *TR
TL* THE CONTACT OWNS A 2003 CHEVROLET AVALANCHE 1500. THE CONTACT STATED THAT WHEN BRAKING, THE REAR BRAKE WOULD SEIZE AND BEGAN TO SMOKE. THE BRAKE PADS WERE REPLCED BY A LOCAL MECHANIC AND THE BRAKE BOOSTER AND MASTER CYLINDER WAS REPLACED THREE TIMES. THE REPAIR DID NOT CORRECT THE FAILURE AND THE REAR BRAKE CONTINUED TO SEI…
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TL* THE CONTACT OWNS A 2003 CHEVROLET AVALANCHE 1500. THE CONTACT STATED THAT WHEN BRAKING, THE REAR BRAKE WOULD SEIZE AND BEGAN TO SMOKE. THE BRAKE PADS WERE REPLCED BY A LOCAL MECHANIC AND THE BRAKE BOOSTER AND MASTER CYLINDER WAS REPLACED THREE TIMES. THE REPAIR DID NOT CORRECT THE FAILURE AND THE REAR BRAKE CONTINUED TO SEIZE AND SMOKE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURED WAS CONTACTED AND ADVISED THAT THE VIN WAS NOT INCLUDED IN ANY RECALLS. THE FAILURE MILEAGE WAS 120,000 AND THE CURRENT MILEAGE WAS 133,000.
TL* THE CONTACT OWNS A 2003 CHEVROLET AVALANCHE 1500. WHILE DRIVING APPROXIMATELY 55 MPH, THE CONTACT NOTICED THE ENTIRE INSTRUMENT PANEL AND GAUGES FAILED TO OPERATE. THE VEHICLE HAD NOT BEEN DIAGNOSED OR REPAIRED. THE CONTACT STATED THE INSTRUMENT PANEL CLUSTER WOULD NEED TO BE REPLACED. THE MANUFACTURER WAS NOTIFIED OF THE DE…
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TL* THE CONTACT OWNS A 2003 CHEVROLET AVALANCHE 1500. WHILE DRIVING APPROXIMATELY 55 MPH, THE CONTACT NOTICED THE ENTIRE INSTRUMENT PANEL AND GAUGES FAILED TO OPERATE. THE VEHICLE HAD NOT BEEN DIAGNOSED OR REPAIRED. THE CONTACT STATED THE INSTRUMENT PANEL CLUSTER WOULD NEED TO BE REPLACED. THE MANUFACTURER WAS NOTIFIED OF THE DEFECT. THE APPROXIMATE FAILURE MILEAGE WAS 200,000... UPDATED 08-07-12 *BF
SPEEDOMETER QUIT WORKING. *TR
"SERVICE ABS LIGHT COMES ON INTERMITTENTLY...DISABLING AIR BAGS! *TR
THE METAL BRAKE LINES ON MY 03 CHEVY AVALANCHE 1500 Z1 TRUCK ARE CATASTROPHICALLY FAILING. THERE IS NO WARNING PRIOR AS THERE WOULD BE WITH OTHER BRAKE RELATED PROBLEMS. THIS FAILURE LEADS TO AN INABILITY TO STOP THE VEHICLE, THE RESULT OF WHICH COULD BE DEADLY. THE DEGRADATION OF THE STEEL LINES IS SO BAD THAT REPLACEMENT OF AL…
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THE METAL BRAKE LINES ON MY 03 CHEVY AVALANCHE 1500 Z1 TRUCK ARE CATASTROPHICALLY FAILING. THERE IS NO WARNING PRIOR AS THERE WOULD BE WITH OTHER BRAKE RELATED PROBLEMS. THIS FAILURE LEADS TO AN INABILITY TO STOP THE VEHICLE, THE RESULT OF WHICH COULD BE DEADLY. THE DEGRADATION OF THE STEEL LINES IS SO BAD THAT REPLACEMENT OF ALL LINE ARE REQUIRED. *TR
I CHANGED THE FRONT BRAKES AND WAS ADJUSTING THEM WHEN THE REAR BRAKE LINE STARTED GUSHING OUT BRAKE FLUID. IHAD IT TOWED TO A MECHANIC AND EXPLAINED WHAT HAD HAPPENED AND BEFORE I FINISHED HE SAID LET ME GUESS "YOU BLED THE FRONT BRAKES AND BLEW OUT THE BACK LINE NEXT TO THE GAS TANK BE HIND THE REAR DRIVER SIDE WHEEL." THIS …
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I CHANGED THE FRONT BRAKES AND WAS ADJUSTING THEM WHEN THE REAR BRAKE LINE STARTED GUSHING OUT BRAKE FLUID. IHAD IT TOWED TO A MECHANIC AND EXPLAINED WHAT HAD HAPPENED AND BEFORE I FINISHED HE SAID LET ME GUESS "YOU BLED THE FRONT BRAKES AND BLEW OUT THE BACK LINE NEXT TO THE GAS TANK BE HIND THE REAR DRIVER SIDE WHEEL." THIS EXACTLY WHAT HAPPENED HE SAID ALOT OF CHEVY TRUCKS HAVE THE SAME PROBLEM. HE IS GOING TTO CHANGE THE REAR LINE. HE SAID WHERE THE LINE IS MOUNTED ALLOWS GRIT SALT AND THINGS BUILD UP IN THIS SPOTCAUSING THE BRAKE LINE TO RUST INTO. THIS COULD HAVE GOTTEN US KILLED HAD I NEEDED TO HIT MY BRAKES HARD. *TR
Official recalls
0No recalls in this snapshot.
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
1EA11001 · Brake Line Corrosion Failure
Opened Jan 5, 2011 · Closed Apr 8, 2015
Status: closed (inferred from source dates) · Service Brakes, Hydraulic; Service Brakes, Hydraulic:foundation Components:hoses, Lines/piping, And Fittings
On January 11, 2011, ODI opened EA11-001 to investigate allegations of premature brake line corrosion failure in model year (MY) 1999 through 2003 General Motors (GM) full-size pickup trucks and sport utility vehicles sold or registered in the following region of the United States that NHTSA has viewed as salt states for investigations of corrosion related issues:Connecticut, Delaware, District of Columbia, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia and Wisconsin.The subject vehicles represent the first five MY's of GM's GMT800 platform production, of which approximately 2,038,504 vehicles were sold in salt states (the subject vehicles).The GMT800 platform includes the following vehicles:1999-2007 Chevrolet Silverado and GMC Sierra 1500, 2500 and 3500 series pick-up trucks; 2000-2006 Chevrolet Suburban, Chevrolet Tahoe and GMC Yukon sport utility vehicles; and 2002-2006 Cadillac Escalade and Chevrolet Avalanche sport-utility vehicles.General Motors produced a total of approximately 10,427,062 GMT800 vehicles for sales in the United States, including almost 5 million that were sold in salt states.Although there are over 60 different brake pipe routing configuration used in GMT800 vehicles, with the exception of the rear crossover pipes in MY 200x-2007 vehicles that changed from rear disc to drum brakes, all of the vehicles use brake pipes from the same supplier with a common double-wall, brazed steel pipe design with a combination of hot dip Zinc-Aluminum corrosion protection coating and Aluminum paint outer layer known in the industry as AlGal (ASTM-B750). ODI analysis of field data regarding GMT800 vehicles identified a total of 3,645 complaints of brake pipe corrosion failures, including 107 alleging crashes, and 40 injuries.Though only 20% of total GMT800 production, due to age and region the subject vehicles account for a disproportionate share of the failure experience; with 2,702 of the complaints (75%), 88 of the crashes (82%) and 20 of the injuries (50%) reported in those vehicles.Analysis of the complaints showed strong correlations to vehicle age and region.For vehicles with less than 8 years of service, the complaint rates were minimal for all regions.In the salt states the failure rates begin to climb as the vehicles advance in age, particularly in the Northeast corner of the United States.The complaint rates in the salt states go from less than 0.1 incident per thousand vehicles (IPTV) at 7 years in service to over 1.0 IPTV after the 12th year of service for the subject pickup trucks and utility vehicles.Most of the failures reported to ODI occurred in vehicles with more than 10 years in service.ODI?s investigation did not identify any specific defect conditions that were causing or contributing to the brake pipe failures.Nor did the analysis isolate the problem to any subject vehicle sub-populations when analyzed by vehicle type or production range.The investigation found that vehicles experiencing brake pipe corrosion failures were likely to have general patterns of excessive corrosion on the majority of the brake pipe assembly and appear to be occurring due to expected wear out for the brake pipe coating material used in the subject vehicles and the environmental conditions in severe corrosion states.A safety-related defect has not been identified at this time.Accordingly, this investigation is closed.The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist.The agency will monitor t
Additional source detail variants (2)
Service Brakes, Hydraulic:foundation Components:hoses, Lines/piping, And Fittings
On January 11, 2011, ODI opened EA11-001 to investigate allegations of premature brake line corrosion failure in model year (MY) 1999 through 2003 General Motors (GM) full-size pickup trucks and sport utility vehicles sold or registered in the following region of the United States that NHTSA has viewed as salt states for investigations of corrosion related issues:Connecticut, Delaware, District of Columbia, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia and Wisconsin.The subject vehicles represent the first five MY's of GM's GMT800 platform production, of which approximately 2,038,504 vehicles were sold in salt states (the subject vehicles).The GMT800 platform includes the following vehicles:1999-2007 Chevrolet Silverado and GMC Sierra 1500, 2500 and 3500 series pick-up trucks; 2000-2006 Chevrolet Suburban, Chevrolet Tahoe and GMC Yukon sport utility vehicles; and 2002-2006 Cadillac Escalade and Chevrolet Avalanche sport-utility vehicles.General Motors produced a total of approximately 10,427,062 GMT800 vehicles for sales in the United States, including almost 5 million that were sold in salt states.Although there are over 60 different brake pipe routing configuration used in GMT800 vehicles, with the exception of the rear crossover pipes in MY 200x-2007 vehicles that changed from rear disc to drum brakes, all of the vehicles use brake pipes from the same supplier with a common double-wall, brazed steel pipe design with a combination of hot dip Zinc-Aluminum corrosion protection coating and Aluminum paint outer layer known in the industry as AlGal (ASTM-B750). ODI analysis of field data regarding GMT800 vehicles identified a total of 3,645 complaints of brake pipe corrosion failures, including 107 alleging crashes, and 40 injuries.Though only 20% of total GMT800 production, due to age and region the subject vehicles account for a disproportionate share of the failure experience; with 2,702 of the complaints (75%), 88 of the crashes (82%) and 20 of the injuries (50%) reported in those vehicles.Analysis of the complaints showed strong correlations to vehicle age and region.For vehicles with less than 8 years of service, the complaint rates were minimal for all regions.In the salt states the failure rates begin to climb as the vehicles advance in age, particularly in the Northeast corner of the United States.The complaint rates in the salt states go from less than 0.1 incident per thousand vehicles (IPTV) at 7 years in service to over 1.0 IPTV after the 12th year of service for the subject pickup trucks and utility vehicles.Most of the failures reported to ODI occurred in vehicles with more than 10 years in service.ODI?s investigation did not identify any specific defect conditions that were causing or contributing to the brake pipe failures.Nor did the analysis isolate the problem to any subject vehicle sub-populations when analyzed by vehicle type or production range.The investigation found that vehicles experiencing brake pipe corrosion failures were likely to have general patterns of excessive corrosion on the majority of the brake pipe assembly and appear to be occurring due to expected wear out for the brake pipe coating material used in the subject vehicles and the environmental conditions in severe corrosion states.A safety-related defect has not been identified at this time.Accordingly, this investigation is closed.The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist.The agency will monitor t
Service Brakes, Hydraulic
On January 11, 2011, ODI opened EA11-001 to investigate allegations of premature brake line corrosion failure in model year (MY) 1999 through 2003 General Motors (GM) full-size pickup trucks and sport utility vehicles sold or registered in the following region of the United States that NHTSA has viewed as salt states for investigations of corrosion related issues:Connecticut, Delaware, District of Columbia, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia and Wisconsin.The subject vehicles represent the first five MY's of GM's GMT800 platform production, of which approximately 2,038,504 vehicles were sold in salt states (the subject vehicles).The GMT800 platform includes the following vehicles:1999-2007 Chevrolet Silverado and GMC Sierra 1500, 2500 and 3500 series pick-up trucks; 2000-2006 Chevrolet Suburban, Chevrolet Tahoe and GMC Yukon sport utility vehicles; and 2002-2006 Cadillac Escalade and Chevrolet Avalanche sport-utility vehicles.General Motors produced a total of approximately 10,427,062 GMT800 vehicles for sales in the United States, including almost 5 million that were sold in salt states.Although there are over 60 different brake pipe routing configuration used in GMT800 vehicles, with the exception of the rear crossover pipes in MY 200x-2007 vehicles that changed from rear disc to drum brakes, all of the vehicles use brake pipes from the same supplier with a common double-wall, brazed steel pipe design with a combination of hot dip Zinc-Aluminum corrosion protection coating and Aluminum paint outer layer known in the industry as AlGal (ASTM-B750). ODI analysis of field data regarding GMT800 vehicles identified a total of 3,645 complaints of brake pipe corrosion failures, including 107 alleging crashes, and 40 injuries.Though only 20% of total GMT800 production, due to age and region the subject vehicles account for a disproportionate share of the failure experience; with 2,702 of the complaints (75%), 88 of the crashes (82%) and 20 of the injuries (50%) reported in those vehicles.Analysis of the complaints showed strong correlations to vehicle age and region.For vehicles with less than 8 years of service, the complaint rates were minimal for all regions.In the salt states the failure rates begin to climb as the vehicles advance in age, particularly in the Northeast corner of the United States.The complaint rates in the salt states go from less than 0.1 incident per thousand vehicles (IPTV) at 7 years in service to over 1.0 IPTV after the 12th year of service for the subject pickup trucks and utility vehicles.Most of the failures reported to ODI occurred in vehicles with more than 10 years in service.ODI?s investigation did not identify any specific defect conditions that were causing or contributing to the brake pipe failures.Nor did the analysis isolate the problem to any subject vehicle sub-populations when analyzed by vehicle type or production range.The investigation found that vehicles experiencing brake pipe corrosion failures were likely to have general patterns of excessive corrosion on the majority of the brake pipe assembly and appear to be occurring due to expected wear out for the brake pipe coating material used in the subject vehicles and the environmental conditions in severe corrosion states.A safety-related defect has not been identified at this time.Accordingly, this investigation is closed.The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist.The agency will monitor t