2008 Vortec Max with roughly 250,000 miles. I keep getting random misfire codes and lean condition(P0300, P1174, P0174). I have did a smoke test on the intake and the exhaust and cannot find any leaks. Truck runs good on highway but as rough idle and goes into closed loop while at idle. I did a compression test today and here are the results. #1-160, #2-180, #3-195, #4-145, #5-205, #6-142, #7-190, #8-200. I’m not sure what the numbers should be but there are a couple weak cylinders. Anybod know what could be going on?
I got an 08 Sierra Vortec Max with around 245,000 miles on it. Debating whether to rebuild, reman, or new crate. My truck has the L76 engine, if I swapped it out for a L96 what all else would I have to change? Computer or wiring harnesses? Mine already has the afm/dod delete done on it. Any other suggestions?
Sorry, guess I should have said I was looking for part numbers and if anybody knew for sure what size would go right in. A lot of what I have researched is more for running duals and I am wanting to stay with the factory tailpipe.
I have an 08 Sierra All Terrain with the 6.0l Vortec Max. I am wanting to replace the stock muffler with something a little bit louder. I am wanting to keep all of the factory pipe that is on it. Anybody know what muffler would just weld right in the factory area? Not sure, but I think it is 3” in and 2.5” out that connects back to a 3” pipe.
I got 99 Silverado 1500 with the 5.3. Pretty sure one of the ac manifold hoses are leaking. I can’t tell if it is at the crimp or just the rubber hose. Either way, is this a common problem? It has leaked everything out of the system.
Anybody found a way to add a usb port to a 2008 sierra without changing radio? I have the 6 disc/am/fm/xm radio now with bise option.
Not looking and doing any performance upgrades, just wanting to replace injectors. The truck is completly stock other than doing away with afm before I bought it. I I went ahead and just ordered a set of 2 hole reman injectors.
Looking to replace the injectors in my 2008 Sierra with the 6.0l. I found some that are aupposed to be an upgraded version with 4 holes instead of 2 and are 310cc. I can’t find any information about these. Anybody have any idea if these truely have any upgrades over the original?
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