August 2008 - fan clutch failure, $800 dealership charge to fix october 2008 - blower motor failure, no heat or air on speeds 1, 2 & 4, only on settings 3 & 5, not sure if it is blower motor or switch.
The worst 2003 GMC L Series problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Acceleration1
- Engine1
- Lights1
- Visibility1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Acceleration1
- Engine1
- Lights1
- Visibility1
Recalls
No recalls on record for this model year.
Technical service bulletins for the 2003 GMC L Series 80
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
- Unknown or other
- Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles
- GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities
- This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves...
- This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as...
- This service bulletin provides information for dealers/technicians on Service Programming System (SPS)...
- This Warranty Administration bulletin provides retail and wholesale service personnel with the...
- This bulletin provides information for electrical ground repairs using new General Motors replacement...
- This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake...
What 2003 GMC L Series owners say
Most recent owner complaints, unedited.
Hazard lighting system, blinkers, cruise control all worked "great" up until I received a recall notice to bring my vehicle in for replacement part. I did as instructed and the part replaced, ever since then they shorted out when using my blinkers or cruise. When my blinker was going and just stopped..I have to push the hazard button in and out and they start working again. I several times took car back and dealership could not get it to malfunction, until finally they told me time had expired for fixing, even though I have history of repeatedly bringing in vehicle. There was nothing wrong with my perfect car until, I took car to dealership.
Compare the 2003 GMC L Series
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Questions about the 2003 GMC L Series
Is the 2003 GMC L Series reliable?
Owners have filed 2 complaints about the 2003 GMC L Series, close to a typical L Series model year.
What is the most common problem with the 2003 GMC L Series?
Acceleration and speed control, with 1 complaint. Next is engine (1).
How many recalls does the 2003 GMC L Series have?
No recalls on record.
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