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Prev Professional Automotive Repair Technical Discussions for July 21, 2014
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2008 Cadillac STS 3.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6DW67VX8
I have tested all of the resistances of the actuators. Found them to all be with in9.2 to 10 ohms. Thin used my snap on scanner the actuate the cams. Found the exhaust actuators to both operate ok. when I operate the intake cam angel control b1 nothing happens... Trouble codes: P0021 (Intake cam position system performance bank 2), P0087 (Fuel rail pressure too low), P0089 (Fuel pressure regulator performance)
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1992 Chevrolet K1500 Cheyenne 5.7L Transmission VIN: 2GCEK19K4N
What could cause trans to act like it is in kick down mode all the time has new t v cable changed gov. Seems like a valve is sticking because once in a while when it gets warm and is used a while it will start shifting right.But when cold will not shift out of...
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2008 Chevrolet Cobalt SS 2.0L No Start VIN: 1G1AP18X88
This vehicle is a no start and first I've had to dive into diagnostics on a gasoline direct injection system. I cannot find any specs on this for high pressure system fuel pressure I should see when cranking. Also, could not find a resistance or current draw s...
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2008 GMC Acadia SLE 3.6L Ac Check Valve VIN: 1GKER13768
This acadia came in with ac problems we evacated then recharged it. Thing is as soon as u turn it on it pops the check valve and shoots freon out. I no there has to be a blockage somewhere just wondering where u guys think should start ive check condensor alre...
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Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Limited 3.8L abs VIN: 1G4HR54K6Y
THANKS TO ALL WHO HELPED ON THIS ONE. THE K.I.S.S. THEORY WORKS AGAIN. AFTER GOING THE LONG WAY AROUND, MY TECH ENDED UP DOING A FRONT BRAKE JOB TO REPAIR. TURNS OUT THE PROBLEM WAS A UN-BONDED BRAKE PAD THAT WAS WEDGING SOMETIMES. OH WELL, IT WAS A LEARNING E...
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1994 Chevrolet Blazer 5.7L No Start VIN: 1GNEK18K4R
Thank you all for your great a valuable post let me tell you guys that the problem was on the cam shaft distributor gear it had two teeth broken off, that was the problem thank you all for your information.
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2001 Chevrolet Impala 3.4L Gauges, compressor
Got it in today ended up just having a bad temp sensor. Looks like it was bad luck I hate it when a car has another problem that does almost what the problem you just fixed did.
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2001 Chevrolet Impala 3.4L spark VIN: 2G1WF55E81
It lost spark due to a failed 7X crank position sensor.
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2004 Chevrolet Trailblazer LS 4.2L compressor VIN: 1GNDT13S94
Thanks to all replies,it was a broken ground wire in harness going to sensor,when we would unplug sensor and check wiring it showed ok,pluged back up and worked ok,applied the old Ford wiggle test and it quit again [that's when we found broken wire] again than...
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2004 GMC Envoy SLE 4.2L no start VIN: 1GKDS13S34
THIS ENVOY ALMOST DROVE ME CRAZY. I WORK BY MYSELF AND SOMETIMES I NEED 4 HANDS. THE PROBLEM WAS POWER DISTRIBUTION BX UNDER HOOD.IT WOULD LET POWER GO AND COME ON THE PURPLE WIRE TO PCM IN RETURN KEPT THE GROUND FROM KICKING IN TO STARTER RELAY.I CHECKED THE ...
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2006 GMC Sierra 1500 SL 4.3L brakes VIN: 1GTEC14X76
Thanks for your help. There were many great thoughts. It turned out the fix was using the mighty vac at the rear wheel cylinders. I pulled about 4 more ounces from each side & i then had a full pedal back. I have had good luck in the past using this method ...
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2008 GMC Yukon Denali 6.2L running board VIN: 1GKFK63828
thanks for the replies. customer is on vacation. will post fix if they return
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2003 Pontiac Montana 3.4L Hesitation, Misfire VIN: 1GMDX03E53
Alright folks, the vehicle is fixed. First of all let me thank everyone for their help. This is a great place to be if you're having car problems and need help. As a few of you mentioned to check the coils for corrosion I went ahead and did that. Spark plug s...
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