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    Uneven Idle is getting progressively worse but cannot find the cause (Fuel Pump / Injectors?)

    I will give this a shot after I take a pass at the Fuel Injectors / Fuel Injector O-Rings. I really with the truck would through a MIL/CEL so I can at least pull a code.
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    Uneven Idle is getting progressively worse but cannot find the cause (Fuel Pump / Injectors?)

    Hey Diver! I used ACDelco Iridium Spark Plug 41-162 and GM Wires. (Truck came with the 6.0 so you're correct on the transmission!) I do not have a Tech2 so I do not believe I can read fuel pump trims (unless it's under a name I do not recognize)? Would you recommend that I replace just the O...
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    Uneven Idle is getting progressively worse but cannot find the cause (Fuel Pump / Injectors?)

    Hey all, I drive a 2008 Chevrolet Avalanche (Body has 150k Miles Engine has 40k Miles...AFM sure is great) 6.0 L L76 V8 (gasoline) with a GM 4L70 transmission. I have an issue where the truck's idle has been getting progressively worse over the last few months. Issue: When at a stop the idle...
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    Transmission too cold?

    Drain and fill.
  5. S

    Engine noise - lifter, rod, ?????

    Appreciate the response! Keep us posted!
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    Engine noise - lifter, rod, ?????

    Hey Geo, Did you ever get to the root cause of this? (I see you’re still active on the forum so I figured I’d ask).
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    Broken Motor Mounts

    ...This makes a ton of sense Thank You! Going to make a separate post on everything I've tried so far to hopefully get to the bottom of this one. The engine only had 25k miles / isn't throwing codes so it's worth the elbow grease.
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    Broken Motor Mounts

    Serious question. I replaced the driver mount and not the passenger mount. Is it possible that my slightly rough idle when in drive is because with one good and one bad mount the truck is now vibrating more?
  9. S

    Broken Motor Mounts

    Did the driver side on my Avalanche this weekend. I'm convinced that 99% of GMT900s on the road are out there with destroyed mounts.
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