2003 Chevrolet Avalanche 1500 Engine Problems
- Complaints
- 3about this part
- Share
- 2%of 182 total for the year
- Median mileage
- 101,300miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine of the 2003 Chevrolet Avalanche 1500, 2% of the 182 complaints for this model year. Where a mileage was given, the median is 101,300 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Engine light and reduce engine power and start loosing speed. After turned off for a few minutes work fine. This year in an hour ride have to stop at least 20 times. Computer codes stated need to change throttle body. Last week I change it and again the same problem.”
NHTSA complaint #10617683, filed 2014-07, 101,300 miles“Rattle form the A/C belt tension-er when accelerating. Have changed multiple new tension-ers and there is still the rattle from the belt tensioner. I have found a TSB on the A/C compressor that leads to the issue.”
NHTSA complaint #10531880, filed 2013-07, 57,253 miles“The contact owns a 2003 Chevrolet AVALANCHE 1500. The contact stated that the low coolant level warning light illuminated intermittently. The vehicle was taken to a dealer where it was diagnosed that the cylinder heads were fractured and allowing coolant to inadvertently enter the engine. As a result, the engine needed to be replaced. The manufacturer was notified of the failure. The vehicle was repaired at the owner's expense. The approximate failure mileage was 125,000 and the current mileage was 129,000. Updated 05/28/14 ma updated 06/4/2014”
NHTSA complaint #10575166, filed 2014-03, 125,000 milesRelated service bulletins
- 11012907Dec 18, 2024This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- 11010544Oct 7, 2024This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- 11004761Jun 28, 2024This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or…
- 10242298Aug 10, 2023This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308…
- 10211658May 2, 2022This service bulletin provides policy information on warranty administration guidelines for multiple repairs with independent causes (GM Canada Dealers Only).
- 10178387Jul 27, 2020This Preliminary Information communication provides information to the technician about finding needle bearings during an oil change. Technician will gain access to the roller…
- 10176645May 28, 2020This information bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- 10176326May 21, 2020This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308…
- 10173398Feb 28, 2020This diagnostic tip provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
- 10167437Oct 14, 2019This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the…
Engine: other model years
Other parts of the 2003 Chevrolet Avalanche 1500
84 complaintsBrakes
53 complaintsAir bags
12 complaintsVehicle speed control
11 complaintsSteering
9 complaintsBody and structure
8 complaintsOther or unknown
7 complaintsVisibility (wipers, defrost, mirrors)
5 complaintsFuel system
4 complaintsSuspension
4 complaintsTransmission and drivetrain
4 complaintsTires
3 complaints
← All problems reported for the 2003 Chevrolet Avalanche 1500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology