I have a 2007 Suerra 1500 4wd Sle. Yesterday a horrible knocking noise started and took to dealership. Today they called saying it needs a new engine. 8k for the new engine. Is this normal and how is this price comparatively? 85000 miles on truck. Thanks
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Engine in GMC Sierra 1500
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Last: 7 yr ago by Macarthur
Damn, sounds like your lifters **** the bed because of the AFM issue. I'd get a second opinion & the motor can probably be rebuilt (better by removing AFM crap) at an independent shop.
Where are you located? I'm sure someone on here can recommend a shop that specializes in this.
Where are you located? I'm sure someone on here can recommend a shop that specializes in this.
Time for a 6.0 or 6.2 swap
Or you can do another 5.3, would find a performance shop to slam it in if you can't yourself. Ideally, you'd delete all AFM hardware in the engine. At minimum, you should have AFM turned off via PCM tune.
Or you can do another 5.3, would find a performance shop to slam it in if you can't yourself. Ideally, you'd delete all AFM hardware in the engine. At minimum, you should have AFM turned off via PCM tune.
I replaced the lifters and cam in my sierra after hearing a light knocking that followed the speed of the engine. they also removed the AFM program and cleaned/rebuilt the injectors. A place called KP racing in Houston did the work for around $2400. a rebuilt engine will end up around $5700 after all the BS.
That still seems crazy high. The parts are like $500 for cam and lifters.Towns03 said:
I replaced the lifters and cam in my sierra after hearing a light knocking that followed the speed of the engine. they also removed the AFM program and cleaned/rebuilt the injectors. A place called KP racing in Houston did the work for around $2400. a rebuilt engine will end up around $5700 after all the BS.
For $5700, you better have an LS7 sitting between the fenders.
I got several quotes for the cam/lifter replacement (included a bunch of other little things: plugs, wires, injector rebuilt, etc) and $2400 was the lowest. KP was the only group that was doing this work regularly.
my FIL just rebuilt his engine (2001 suburban) with Thunderbolt and his total was $5700.
my FIL just rebuilt his engine (2001 suburban) with Thunderbolt and his total was $5700.
Well, what cam did you get?
Those engines are having lifter problems. Change motor oil to 5w30. Regular motor oil. Non synthetic and add 8 ounces of marvel mystery oil. That should make noise go away after a day or two of driving. Change oil again in 1000 miles
1500 to 1800 tops.
What silvy said. Time to throw a good cam, ditch the afs, tune it. Truck will run better than ever.
Find a hungry gm mechanic, should have it all done in a weekend
Find a hungry gm mechanic, should have it all done in a weekend
What is AFM?
NM
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