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Prev Professional Automotive Repair Technical Discussions for May 25, 2012
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1978 Chevrolet G20 Chevy Van 6.6L Rear main seal VIN: CGR357U209
This van has a rear main seal leak. We took it apart and found that the re builder used black RTV on the rear main seal. We did not find this out until after our first attempt to remove the seal failed. RTV was placed on the bearing cap and block to retain the...
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1985 Chevrolet Camaro Sport 2.8L Cooling Fan VIN: 1G1FP87S7F
Off the road for the past 6 yrs (no rodent damage found), cooling fan will always run switched on by ECM, as long as engine is running. KOEO will not run until engine is started-if engine stalls, cooling fan stops. Removing c.f. to ECM ground circuit will shut...
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1989 Chevrolet S10 2.5L aldl VIN: 1GCBS14E2K
This is a friends project car. The engine and wiring harness has been changed from a 1991 S10. I have no Data from the ALDL link and have tested the ALDL as well as power and grounds at the computer. All were ok, except that the computer was not grounding the ...
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1998 GMC Yukon SLE 5.7L Misfire, MIL Lamp on VIN: 1GKEK13R6W
vehicle came in no start, replaced ignition module now vehicle runs but very poorly. missing and backfiring. sets code p1345 crank cam correlation. cked cam retard reading 27 degrees try to set to 0 vehicle will not run. pulled dist and reset to cyl 8 mark ret... Trouble codes: P1345
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1998 GMC Sonoma SL 4.3L Charging VIN: 1GTDT14X2W
Thanks all; This little GMC has a charging system problem. Most times when the truck starts cold the battery light goes out and it charges normally, when you shut it off and restart hot, about 50% of the time the battery light is on and it is not charging. Whe...
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1999 GMC K1500 Suburban SLE 5.7L No Start VIN: 3GKFK16R3X
Hello Tech's. I have replaced this vehicles fuel pump with an updated style unit once before. Checked both power and ground at the fuel pump, both good. PSI at the fuel rail was 40psi. Spec. is 55psi with engine running. Dead head pressure on old pump was 40ps...
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1999 Oldsmobile Aurora 4.0L headlites/taillite/stoplite VIN: 1G3GR62CXX
noticed battery would go down fast w/door open.tested battery n had bad cell,also was old as the moon.replaced n was told earlier by owner that they got rid of car cause of hi dollar application on parts n had no head lites except for when u pull for hi beam t...
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Fixes & Summaries for GM
Fix/Summary Answers
1995 Chevrolet K2500 Cheyenne 6.5L Convertor lock up VIN: 2GCFK29S7S
Three responses received: Check eng. temp., check brake switch and check for a shorted lock up solenoid. All three of these were in spec. Will close this request for now and try to get back to this truck at a later date. Thanks for all the help!
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2004 Chevrolet Tahoe LS 5.3L compressor VIN: 1GNEK13Z44
It's fixed, and now I know a lot more about that outside air temp sensor.The scan gives two readings for the same sensor. The raw reading is the actual real time temp. But it is located in front of the condenser, so it can pick up a lot of heat. The filtered ...
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1997 GMC Yukon SLE 5.7L fuel system. VIN: 1GKEK13RXV
Thanks to all that helped. The problem was indeed the week fuel pump. This was my first time experiencing a pressure issure that wasnot a blockage or restriction. And I now know when it says 60 to 66 psi, 56 isn't close enough. Can't thank you enough!
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2000 Pontiac Bonneville SSEi 3.8L Stall VIN: 1G2HZ5410Y
IATN IS RAZZING ME TO CLOSE THIS REQUEST ALTHOUGH I AM NOT SURE WHATS GOING TO HAPPEN YET. THE CAR HAS BEEN OUT FOR ABOUT 2 WEEKS NOW AND HAS NOT ACTED UP. AS I SAID IN MY LAST POST WE CUT THE INPUT WIRE FROM PCM TO THE FUEL PUMP CONTROL MODULE. THIS CAUSES FU...
14
2008 Pontiac Grand Prix GXP 5.3L Erratic Shift VIN: 2G2WC55C48
Thanks everyone for the help. A new TCM fixed this car.
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