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  1. S

    Tahoe 2003 mysterious stalls

    Yep, stick with Delco when doing engine sensor parts. Sent from my XT1053 using Tapatalk
  2. S

    3/4 Ton Suburban Running Hot

    Yep, fan. Also, backwash the radiator from the engine side. Sent from my XT1053 using Tapatalk
  3. S

    Explain the underhood light

    Originally was a level switch in the light housing. Open, the switch moves one way, close it moves back. Sent from my XT1053 using Tapatalk
  4. S

    Differential Oil Change 04 Tahoe

    01 4x4 burn with tow has a drain. May depend on which rear end you have. Sent from my XT1053 using Tapatalk
  5. S

    2004 Tahoe Radio Swap

    Lazy parts guy. He could drill down through parts diagrams to get to the list of possible. Use your vin to confirm his list of possible. Sent from my XT1053 using Tapatalk
  6. S

    Factory Bose 6 disc in-dash changer, CD function died, '04 Z71

    Unique part. Use GM sites to get a part number and then find a site that shows where used b compatibility. My local gm supplier allows me to search compatibility db with a part number. Sent from my XT1053 using Tapatalk
  7. S

    Coolant loss because of bad o-ring in heater core tee fitting

    They are quick connect for mfg line efficiency - and the design is not as strong as old fashioned pipe and clamp. Sent from my XT1053 using Tapatalk
  8. S

    03 Tahoe dies & battery light comes on

    Just had the same symptoms with 01 Burb. Ran all the battery/alternator tests and watched the burb stop while testing. Turned out to be the fuel pump. Sent from my XT1053 using Tapatalk
  9. S

    AC problem, help needed.

    Wrong size belt would push the tensioner farther out towards the ac lines. Or the tensioner spring is shot Sent from my XT1053 using Tapatalk
  10. S

    4l60e problem

    Oil pressure is created with oil pump (transmission removal) there is a valve that regulates the pressure - ~ 80 psi at idle and over 200 at WOT. Bad seals, worn valves, messed up separator plate could cause loss of pressure. Or a bad pressure valve/solenoid. A shop should be able to attack a...
  11. S

    2003 Yukon Where Is My Coolant Going?!?!?

    Pressure test the coolant system (parts house rental tool). You can also get a liquid to mix with coolant to see if exhaust gasses are in the coolant (HG issue). Be sure to run the vehicle for a while and them sample the coolant) Sent from my XT1053 using Tapatalk
  12. S

    4l60e problem

    Let's get back to basics before proceeding. Rebuilds happen for 3 general reasons 1) poor maintenance and care 2) product defect failure 3) change of use/spec For grins sake, let's ignore the first one. For every rebuild you hear about, there is another that is going just fine after 200k...
  13. S

    4l60e problem

    I suggest getting a rebuilt valve body with a set of sonnax valves. Also, replace the separator plate with a transgo plate (harder metal). Have! A set of transgo springs around in case any of the accumulator springs are broken. Also good to have, replacement metal Pistons, pins, seals and...
  14. S

    Suspension Inspection Question

    Check steering rack mounting for looseness Sent from my XT1053 using Tapatalk
  15. S

    Anyone have this

    GPS tracker 8-O Sent from my XT1053 using Tapatalk
  16. S

    Coolant temp 02 Tahoe

    Infrared gun only reads the pinpoint temp and can't compensate for the heat distribution around the point. Thermostat housing could pick up heat from water pump or block , or be cooled by the fan. Excessive fuel consumption is most commonly caused by a) excess air to which the pcm adds fuel to...
  17. S

    GMT 800 Towing Package?

    01 burb with tow package and 04 Sierra without. Both have tow switch as stock. Burb has added tranny cooler, and power steering cooler. Also, a skid plate was included for the front diff (4wd). Sent from my XT1053 using Tapatalk
  18. S

    4l60e problem

    Sounds like pressure is low, and/ or the forward/reverse accumulator is leaking or broken. Did he replace the separator plate - some of the check ball holes may enlargened the old plate of it is still there. Also, many/most rebuilders will reuse springs and pistons on the accumulator unless...
  19. S

    coolant changeover, and water pump question

    There are writeups discussing the chemistry of antifreeze. In general, various elements cause the fluid to break down into stuff including acids. Dexcool contains a buffer to minimize the acid properties. But eventually the buffer will get used up and the acid will start eating things , thus the...
  20. S

    catalytic converter

    No aftermarket oem direct fit CARB available. Magnaflow makes a pair of universal fit that can be installed in place of the existing pair via cut and weld on the existing y pipe. Sent from my XT1053 using Tapatalk
  21. S

    Transmission not shifting real great 2004 Yukon XL Denali

    Initial run of a engine/tranny will produce some initial metal/ clutch material as surfaces mate. The magnet is used to pull the metal out of suspension as an aid to the filtration prices. It also aids the visual inspection process. You can operate without the magnet , but not recommended. As...
  22. S

    Rear A/C failure. Sounds coming from engine compartment.

    Junking in late. Coming out of the compressor, pipe (y pipe) should be warm. Upper will turn cold after the orifice located in the first coupling. The rear lower pipe will remain warm (with fluid) to the back where it will pass through the expansion valve. It should be cold at that point. The...
  23. S

    Transmission not shifting real great 2004 Yukon XL Denali

    Yep, pull the upper hose to the radiator. Parts shops sell a short pipe that will fit the radiator, attach vinyl hose from it to 5G bucket. If you have a drain bolt remove and drain pan or Start engine, pump out 1-2g. Drop pan, do work as needed. Replace pan, add equivalent amount of fluid...
  24. S

    Transmission not shifting real great 2004 Yukon XL Denali

    High rpm shift points are normal for this generation of transmissions. Factory service manual spec shows a range of 1000 rpms from 12% throttle to wide open. +/-250rpm. Tow mode settings will raise this rpm range a bit. A true rebuild sign would be burnt tranny fluid or material in the pan. A...
  25. S

    Front end noise

    Sticky caliper? Normal caliper should allow piston to backoff by having the rotor flex spread the pads apart a bit. Sticky caliper works prevent this causing pads to continue scraping the rotor. Sent from my XT1053 using Tapatalk

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