
mjm-1957
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mjm1957
- Birthday 03/19/1957
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Normal Oil Consumption? 09 Yukon Denali 6.2
mjm-1957 replied to jjdurrant's topic in 1999-2013 Silverado & Sierra 1500
Of course you are correct, brain fade, sorry for the misinformation. -
mjm-1957 started following 8 speed suddenly went out. No forward or reverse gears, Normal Oil Consumption? 09 Yukon Denali 6.2, Power Steering Pump Seals and and 4 others
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Normal Oil Consumption? 09 Yukon Denali 6.2
mjm-1957 replied to jjdurrant's topic in 1999-2013 Silverado & Sierra 1500
More than likely with that mileage a good decarbonization with top engine cleaner may help to free up the piston rings and may help to lower your oil consumption but it is within GM guidelines.We are told that 1qt per 1000 miles is acceptable as stated above but I agree that is excessive. Just because I work there doesn't mean I agree with that.guideline. -
I have been a GM line mechanic for 46 years. When I started in this business we overhauled everything, starters, alternators,steering boxes etc... now everything is throw away crap. Take one out, ****** can it and replace.No skill required.
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Service 4wd message...stuck in 4wd!!!
mjm-1957 replied to Brock Allen's topic in 2014-2018 Silverado & Sierra Troubleshooting
There is an updated transfer case control module calibration for that exact problem. Call a GM dealer with your VIN and they can run it and check if it was ever done. -
2008 Chevy Avalanche ltz gages,locks going crazy
mjm-1957 replied to DAMIEN SEAY's question in Ask the GM Technician
There a couple of older bulletins similar to what your describing. I can't figure out how to send a link but the actual bulletins are PIT4730B,document ID #4902455 and the other one is 08-07-30-021H document ID#4213654. They have a lot of good information in them about no start conditions and door locks cycling with gauge cluster problems. Hope you can get access to them. Don't throw anymore parts at this. Its probably a backed out terminal or an intermittent short to ground taking down the high speed lan. Good luck. -
2008 Chevy Avalanche ltz gages,locks going crazy
mjm-1957 replied to DAMIEN SEAY's question in Ask the GM Technician
Does this vehicle have any aftermarket remote start or alarms added to it? First place I would be looking at if anything was added on. They are usually poorly installed and the components are garbage. -
Potential water leak, just like a sun roof.The less openings the better.
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Low Oil in Diesel Engine 6.6L
mjm-1957 replied to AK_ Maverick-X3's topic in 6.6L (LML/L5P) & 6.0L (L96/LC8) Tech
Diesel engine takes 15W40 oil not 5-W30. -
Even if you unplugged the wiring harness you would still have reverse and one forward gear as a failsafe. That 8 speed transmission is a huge piece of ****** and has been trouble from the start in 2014. I am the transmission guy at a Buick- GMC dealer and can't believe that GM released this trash and can't come up with any fixes for it. I spend most of my time trying to fix the unfixable, harsh downshifts, flares on up shifts, delayed engagement and of course the TCC shudder.Absolute garbage, they should make a retrofit kit to slip a 4L80 in instead.
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