8.7
pretty bad- Typical Repair Cost:
- No data
- Average Mileage:
- 15,100 miles
- Total Complaints:
- 3 complaints
Most common solutions:
- not sure (2 reports)
- rebuild engine or GM should warranty to 150,000 miles (1 reports)
ive had to check and add oil since i bought the truck////the oil light came on a couple months ago and it did not register on the dip stick////it took 2 qts. to fill... now my spark plugs need to be replaced---they have 20000 miles on them and they are expensive denso plugs.... gm said they would warranty the engine to 100000 miles////i didnt know what to say to the rep... i need advice////8.1 vortec
- wesgmc, Coos Bay, OR, US
AT 600 MILES THE 8.1L ENGINE STARTED TO CLATTER LOUDLY AT COLD STARTS AND AT 3,200 MILES THE ENGINE GAVE A LOW OIL WARNING. IT HAS BEEN CONSUMING A QT OF OIL EVERY 1,500 TO 1,600 MILES SINCE THEN.
- Darrell C., St. Marys, GA, US
From the time the truck was new, it has never used less tha 1 qt. of oil per thousand miles. Now it uses about a qt. per 500 miles. It has 33000 miles on it. the truck does not smoke, and it does not leak oil. It also has the " cold start knock". I suspect the knock is really piston slap resulting from poor manufacturing tolerances born from poor engineering. I've been reading on the internet and heard about things like a tube that extends from the underside of the intake manifold that could be sucking oil. if anyone has an answer, I'd be happy to hear it.
- Joel F., Osceola, IN, US