Recent content by shoplizard

  1. shoplizard

    2012 suburban disappointment

    I suppose you are right there may have been more broken studs out there that I didn't see since my expertise was mainly transmission and electrical. Most of the mechanical engine service and repair went to someone else. I do remember a few in the early 2000's, neither of my 53's with over...
  2. shoplizard

    2012 suburban disappointment

    Good morning, I would like to make some comments regarding the issues on your suburban. First is the broken exhaust studs, I worked as a technician for a GM dealer for 25 years and only saw a few engines with broken studs I live in northern Montana so we experience extreme heat and cold. Second...
  3. shoplizard

    Need Help. 2011 Tahoe cooling system will not pressurize.

    Have you checked the HVAC system for fault codes, I am assuming your Denali has auto HVAC and therefore can be accessed by a scan tool. For the most part, what you are describing is normal operation, the cooling system will not build pressure until the engine temperature exceeds the boiling...
  4. shoplizard

    New body old body fixup

    I would like to comment on an earlier post regarding the repair of the rust on your Denali, if it is like any of the others I have seen come into the shop I used to work in, you are wasting a lot of time and money attempting to make the vehicle a nice ride, in my opinion, it never will be and it...
  5. shoplizard

    P015B Check Engine Code

    I found this web page describing this code as a generic code, almost all makes. https://www.obd-codes.com/p015b I hope it will help you.
  6. shoplizard

    Transmission shifting hard

    Tcc regulator valve problems were an issue in the mid to late 90's after that the valve bodies were modified to correct that problem which caused the tcc slip codes to set and cause harsh shifts. Another item that will cause a harsh 1-2 shift is a broken 1-2 accumulator spring located in the...
  7. shoplizard

    200,000 miles

    If you are concerned about low oil pressure in your engine, you should check it with a known accurate gauge (mechanical or digital) installed at the oil pressure sending port of the engine. Checccccccccccccccccck the pressure at idle and 2500 rpm with the engine at operating temperature. If the...
  8. shoplizard

    need help solving lean condition

    Just out of curiosity, how does the vehicle run on the highway at WOT? What is the MAF reading and what are the LTFT readings on each bank at WOT (wide open throttle).Your MAF should be around 200 GPM (give or take 20). and both LTFT's should be near 0. If the MAF readings are very low and the...
  9. shoplizard

    Please help! Heat doesnt work!

    Hi, I have read your story and I feel your problem is a flow through the heater core problem. When you replaced the heater core, what was the condition of the coolant? Was it clear and not cloudy and orange, like rust sludge. I used to see a lot of that in R and W engines. Did you flush the...
  10. shoplizard

    Coolant Leak after changing Thermostat?

    There is one thing you might check is the little hoes that attaches to a nipple on the passenger side of the radiator near the top. Remove the hose carefully and check and clean the inside of the nipple on the radiator. Add some coolant to the reservoir and verify that coolant and air come out...
  11. shoplizard

    Throttle body acting up

    The problem you are encountering could be caused by a broken wire to the throttle body from the control module. I think the module is mounted on the firewall next to the left hood hinge. You may have to carefully remove the wires from the loom on the right side of the intake manifold. Inspect...
  12. shoplizard

    Please Help Guess the Part!!!

    Yep, your rear axle is TOAST. I'm pretty sure you don't want to attempt to repair it. I have done quite a few of them and you will need a lot of special tools and experience would be helpful. Start searching salvage yards for a good used axle assembly.
  13. shoplizard

    Please Help Guess the Part!!!

    The amount of oil coming from behind the yoke is very minimal. A seriously leaking seal will fling oil all over everything. I don't believe the seal is a problem. You are still going to have to perform the checks I suggested to be able to come to some conclusion as to what your problem is, Good...
  14. shoplizard

    Please Help Guess the Part!!!

    Hi I have a couple of suggestions for you. First, when you check the u joint for slack, set the parking brake and put chokes under the wheels, then put the trans in neutral, engine off. Grab the rear of the prop shaft and check for movement. If the u-joint is bad it will most likely rattle and...
  15. shoplizard

    Whoop/Squeak when hard accelerating

    I can't say I have seen a 2WD Takoe, but the symptoms sound the same as with a 4WD. As you accelerate the rear differential tips down pulling the drive line slip yoke out, when you decelerate it is pushed back into trans mission. If this slip yoke sleeve, bushing and/ or seal are dry and/or...
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