Three problems related to check engine light on have been reported for the 2002 GMC Sierra. The most recently reported issues are listed below.
Tl- the contact owns a 2002 GMC Sierra. The contact stated that the glow plugs malfunctioned as the check engine warning light illuminated. The vehicle was taken to a dealer for diagnosis where the glow plugs were replaced. The manufacturer was notified but offered no assistance. The VIN was unavailable. The failure and current mileage was 41,700. Kmj.
The engine shuts off after it warms up. This can happen at any time and any speed. After waiting approx. 2 minutes it will start again and run fine for the rest of the day. No check engine lights or diagnostic codes are available. There is a recall for the 2001 models (campaign id # 07v521000). This problem also extends into newer model years. Mine was manufactured in 1/02.
Intermittent surges, loss of power while in motion, transmission, lack of acceleration. At purchase, the check engine light came on three times before leaving the dealership lot. Dealer advised that the dealer installed remote starter or alarm system was interfering with fault sensor and was not a problem. However the lost power while driving, intermittent surges and stall outs at freeway speed/85 mph still existed. On one occasion consumer was almost in an accident when the transmission clanged between gears and there was poor acceleration. Consumer had to shift into 4 wheel drive or manually downshift, or turn the engine off then on again. Dealer replaced pcm module, fuel pressure regulator and gaskets, fuel pump assembly. However problem still exist. Dealership agreed to hold the vehicle for further investigation. Further investigation revealed that the wires from the dealer installed accessories such as the alarm system and remote starter or anti-thief system, and factory wire from pcm/vcm to the transmission be replaced. Dealer replaced all ignition wiring, wiring from the pcm/vcm to the transmission and replaced the control valve body that regulates the cruise control. Consumer has been without vehicle for more than 21 days and will seek a replacement vehicle if wiring repairs does not remedy the problem(s).