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Prev Professional Automotive Repair Technical Discussions for June 30, 2011
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Open Help Requests for GM
Help Request Answers
1997 Cadillac Seville STS 4.6L Thermostat VIN: 1G6KY5294V
customer wants thermostat replaced. i do not know location of stat, does not appear to be under upper rad hose, suspect it to be under lower hose and would appreciate confirmation.
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2004 Cadillac Escalade 6.0L hard steering VIN: 1GYEK63N44
The steering on this Escalade gets hard only when turning steering wheel to left side while parking. we flushed out all steering fluid several times, went through a couple of quarts of trans fluid and flush to check if any valves were sticking in hydraboost or...
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2008 Cadillac Escalade ESV 6.2L Hesitation, Stall, MIL Lamp on VIN: 1GYFK66818
thanks in advance. This one is really intermittent-difficult to reproduce. Can occur in 60 miles or not for [...]. MIL comes on & DIC message for "reduced power", "Stability system disabled" looses power- NO accleration/ idle speed only. (DANGEROUS!! can't ... Trouble codes: P2135 (TPS correlation incorrect), P2119 (Closed throttle performance fault)
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1999 Chevrolet Tahoe 5.7L Poor Idle Quality, Misfire VIN: 1GENK13R2X
Hello all, This tahoe is not quite making sense and I'm looking for a conformation of my thoughts. 1999 Tahoe with a 5.7. Came into my shop for running bad and back firing. Owner had already been there and replaced the coil and broke the distributor loose so t...
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2005 Chevrolet Malibu LS 3.5L Exhaust Valves VIN: 1G1ZT52875
Reinstall heads and in the shop it sounded great. On the test drive the engine started to clatter like it had lost oil pressure with no loss of performance. Installed pressure guage for oil and we have great prressure. Removed valve covers to check for free pl...
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2008 Chevrolet Cobalt LS 2.2L No Start VIN: 1G1AK58F58
found the only repair for fuel pump is insert in tank or buy whole tank 1300.00 bought pump conector was melted dealer could not find one very odd small conector. made my own conector with gm pins and soldered to pump for insurance. tried to start car computer...
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1985 GMC C1500 Sierra Classic 5.0L compressor shaft seal VIN: 1GTDC14H2F
I'am installing a new compressor shaft seal but I need a special tool to install the seal the compressor type is a R4 I need to know from who I can get the tool from.
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2005 GMC Sierra 1500 4.3L alternator VIN: 1GTEC14X55
Truck originally came in with customer complaining of intermittent low voltage on gauge and a chrging system error displayed on his info display, alternator was replaced at his request and battery was tested. One week later truck comes back with battery light ...
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2007 GMC Yukon XL 1500 Denali 6.2L Fuel Gauge VIN: 1GKFK66897
The fuel gauge read empty. Checked the circuits by plugging another module into the harness raise the float and the gauge goes up, lower the float and it goes down. I got a new module and installed. When the tank is now full the gauge only reads a little over ...
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2001 Pontiac Montana 3.4L No Start VIN: 1GMDX03E31
Hello Everyone, Have a real difficult one here. The PCM sends a power signal to the fuel pump relay to energize the pump, that signal is missing from the PCM. I can jump power to that terminal on the relay and the van will run forever. That confirms that all t... Trouble codes: P0230
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2007 Saturn Aura XR 3.6L Electronic Stability System VIN: 1G8ZV57727
Hello, the driver information system reads ESC OFF. Cruise control inop. Has code C0161(brake lamp position switch) & U2125(Class 2 loss of communication). After replacing brake position switch all was good for a few days, now returned with ESC OFF on dash. An...
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Fixes & Summaries for GM
Fix/Summary Answers
1991 Chevrolet Camaro Z28 5.0L Hesitation, MIL Lamp on VIN: 1G1FP33F4M
WELL THE CUSTOMER HAS NOT REALLY DRIVEN THE CAR THAT MUCH SO THE LIGHT HAS NOT RETURNED YET, I DO NOT BELIEVE IT IS FIXED AND WHEN I AM ABLE TO GET BACK AND TEST IT I WILL POST MORE. MOST REPLIES WERE SAYING TO NOT USE REMAN PARTS, THOUGH I CAN UNDERSTAND THE ... Trouble codes: 43 (Esc circuit).
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1994 Chevrolet Corvette 5.7L No Start VIN: 1G1YY22P1R
As suggested I rechecked powers & grounds by using a headlamp load test. All passed. I contacted a tech with a lab scope & tech 1, he scanned it & we tested circuts with lab scope. I would crank, start, run 5 seconds and the injectors would turn off, engine di... Trouble codes: 16 (low resolution pulse failure), 42 (EST grounded), 41 (EST open).
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1995 Chevrolet Blazer 4.3L 2-3 Shift VIN: 1GNDT13W0S
Turned out to be the input sprag, just like Mike from BC was saying. First, confirmed line pressure rise prior to shift at the same time PCS amp readings dropped. When the shift would flare out the pressure immediately dropped to idle pressure of 120 psi. Tor...
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2001 Chevrolet Suburban 1500 5.3L overheat
Thanks for all the replies verifying what I thought was the radiator. I took the radiator out, and ran water through it. The top, bottom, and sides were ice cold, but the middle was warm (ambient temp). I did the same thing with the new radiator, and the en...
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2004 Chevrolet Astro 4.3L Excessive Emissions, Poor Idle Quality, Stall, MIL Lamp on VIN: 1GCDM19X14
Thanks for all the info.I replaced the coolant sensor again. the first was a napa sensor, and it did not work properly. i did see that some people had problems with the napa sensors. installed another ect sensor from oreillys, and the temp did not bounce aroun... Trouble codes: P0118.
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