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  1. R

    GM is buying back my Yukon

    Ashley, I am a retired electrician with extensive experience in control systems and industrial installations. I have come to the conclusion that the more complicated a system is, the more difficult it is to produce a quality product. There are many folks who lease vehicles so that about the end...
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    Terrible surging issues

    Low fuel pressure, lean mixture sure points toward fuel pump. No regulator or return line is very strange. I wonder if that is a previous owner modification. The pressure to the injectors would be whatever the max output of the pump is. That would seem to be hard on the pump, with no pressure...
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    02' Denali transmission issues...please help!

    One thing to check, were plugs installed in the transmission cooler connection on the radiator when the tubes were disconnected? Since that cooler had started leaking fluid into the radiator, there are holes in the cooler. Those holes will leak coolant out through the tubing connections if not...
  4. R

    2002 denali transfer case interchangeable

    rockauto.com carries a selection as well
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    Reduced Engine Power?

    There are many devices that can cause a loss of power. Have you done scheduled maintenance like fuel filter, spark plugs, air filter? A loose or corroded connection to the knock sensors under the intake manifold can cause this, loose or corroded connections to a wheel speed sensor or to the...
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    Intermittent idle problem

    Squeaks no good. Replace the alternator before that belt locks up and tears up a bunch of expensive stuff like hoses, radiator, fan, tranny cooling hoses, etc. It gets real expensive fast. Replace the belt tensioner too. I speak from experience (700$)!
  7. R

    Axles...magic?

    When axles get dry from the boot not containing the grease, the axle constant velocity joints get tight and start to partially lock up as the wheel goes around. This can accelerate wear in the hub bearing, cause vibration, wandering, poor braking and steering. As the hub bearings wear, the rotor...
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    Water in oil but....is it really a HG problem?

    Unless you are running an older engine, the intake manifolds on the LS motors do not have coolant running through them, so the gaskets have no affect on coolant, but are certainly a failure point on these reliable engines. This is one of the benefits of plastic parts which do not conduct the...
  9. R

    Intermittent idle problem

    p0300 random misfire p0154 o2 sensor insufficient activity p0141 o2 sensor heater malfunction The codes tell me that you may have an intake manifold gasket problem or a fuel problem from injectors being clogged. Too much air creates an improper fuel/air mixture (too lean). The o2 sensor may see...
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    Cooling System Not Pressurizing

    You could buy an ultraviolet dye kit. Add the dye, drive, wait till night, look for leak with the ultraviolet flashlight. http://www.autozone.com/test-scan-and-specialty-tools/uv-light-and-accessories/quest-8-oz-engine-coolant-uv-dye/835773_0_0/
  11. R

    Intermittent idle problem

    Have you had it checked for codes?
  12. R

    Cooling System Not Pressurizing

    If you are smelling antifreeze outside the truck, you have either one or two cracked heads or a bad head gasket. The coolant can only be smelled outside if it is coming out the exhaust, since you are not seeing a leak. Aluminum heads warp easily when overheated. Your engine probably got...
  13. R

    Here's a weird one...

    For those who might wonder why a loose or corroded engine ground can destroy a module, one way is when the starter is activated, the only way to complete the circuit is through whatever grounds are available, like grounds that connect to modules, ECM, etc. That is way more current than the...
  14. R

    4x4 started binding

    That hub can get so hot, it can break, then the wheel may pass you. Very dangerous.
  15. R

    Desperately in need of help with a P0178 code

    Have you seen any critters around? Mice like wire insulation for dessert.
  16. R

    05 Yukon Ocassionally Won't start...just cranks.

    Check Rockauto.com. They have AC Delco for much less than $400
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    Brake issue: occasional slight kick back and ABS feel in pedal

    Flushing the brake fluid does help sometimes. My fluid was old, and I had similar symptoms. New fluid did improve the pedal feel. The moisture in the old fluid can vaporize under certain braking conditions. Also, hydroboost seems to have a different pedal feel, both my Ford F-250 and the Tahoe...
  18. R

    04 tahoe no brakes/ps at very slow speeds

    Is it possible that the power steering got stressed by turning in deep snow? Maybe the pump went bad. Low power steering hydraulic pressure would also prevent brakes from working.
  19. R

    Preparing for a west cost road trip in a 05 Denali towing 7k.

    You can use a tranny cooler for cooling your oil. If you are towing that heavy a trailer, the oil will get very hot.
  20. R

    Coolant Leak

    At auto parts stores you can get a kit with ultraviolet die and a special flashlight with an LED that puts out ultraviolet light. Put the die in the coolant, drive, use flashlight to find possible sources of leak.
  21. R

    '01 Tahoe whistling noise *FIXED*

    Are you sure that the noise isn't coming out of the tweeters located up near the windshield? A failing alternator can produce noise in the audio system that varies with engine rpm.
  22. R

    05 Yukon Ocassionally Won't start...just cranks.

    You can install a temporary fuel pressure gauge in the rubber hose that feeds the injectors. You would need a brass tee with barb fittings to do this. Run the fuel hose out the front and tie the gauge to the wipers so that you can see it while driving. Your symptoms are typical for a failing...
  23. R

    Gas fill still slow and code P0446

    Have you checked the vent tube for obstructions or kinking? There is the fuel fill (usually about 1.5 to 2.0 inches diameter) and then a fuel tank vent tube that parallels the fill tube. The vent tube is usually about .6 inch in diameter. If the rubber hose that connects to the tank is kinked or...
  24. R

    Trying to repair a stolen Tahoe! help!

    If you google or search for rebuilt clusters, there are multiple companies on Ebay, Amazon, the internet that sell repaired clusters with a warranty. They even have a phone number. Most are easy to deal with, don't buy from them if they don't have a phone number. Call to check if they answer.
  25. R

    02 escalade gauges gone wild

    Before checking out the price of that BCM, go buy a new battery. On two different GM and a Honda vehicles that had similar problems, I replaced the battery and the weird problems went away. Batteries can start failing internally in a way that can cause malfunctioning modules in GM vehicles...

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