Engine Misfires

10.0

really awful
Typical Repair Cost:
No data
Average Mileage:
33,000 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. replace intake gasket (1 reports)
2002 GMC Sierra 1500 engine problems

engine problem

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2002 GMC Sierra 1500 Owner Comments

problem #1

Oct 042006

(reported on)

Sierra 1500 SLE

  • 33,000 miles

A D V E R T I S E M E N T S

Engine began randomly misfiring, making it nearly impossible to increase speed faster than a light accelleration. The service engine soon light would flash and then stay on.I personally replaced the spark plugs and wires, air filter, fuel filter, and added injector cleaner to no avail. Had the vehicle hooked up to 3 seperate computers and all gave the code "P0300 random cylinder misfire." 3 seperate mechanics were at a loss at initial diagnosis. The problem seemed to occur in the even numbered cylinders. After finally taking it to the GM dealership, they stated it was an internal vacuum leak caused by a bad intake gasket. The worst part is the vehicle only has 33,000 miles on it. The only relief is that the dealership handled the problem very well, and worked with me a little on price with the repair.

- , Toledo, OH, US

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