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Prev Professional Automotive Repair Technical Discussions for February 1, 2012
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Open Help Requests for GM
Help Request Answers
1992 Chevrolet Corvette 5.7L gauges VIN: 1G1YY23P4N
the lights on the four guages on the right side of instument cluster flicker . does not affect eny of the other lights . does it with reostat moved to high or low light . doe not have very good wiring diagram .
1999 Chevrolet C1500 Suburban 5.7L Hesitation, Misfire VIN: 3GNEC16R5X
Hi guys, I have a problem suburban thats driving me nuts... it has a problem with the plug wires arcing or carbon tracking, You can see all 8 doing it in a dark garage, I replaced the cap rotor , wires and plugs. ac/ delco plugs, cap and rotor, aftermarket wir...
2005 Chevrolet Avalanche 1500 LT 5.3L rear end VIN: 3GNEK12Z45
Customer complains of poor gas mileage & left rear tire skipping around left hand turns. Ive never experienced it myself,but was test driven many times.Customer states that its happened 4-5 times over the past 2 years.In the past 2 years only gets 11 mpg.any h...
2004 GMC Envoy SLE 4.2L Exhaust Manifold Bolt VIN: 1GKDT13S04
Out of all 11 bolts securing the exhaust manifold to the head, the farthest rear bolt breaks off about 1/4" inside from flush. There is no possible way for even an angle drill with a 1" bit to drill this bolt out. My question to you all is, do I pull the cyl...
2001 Oldsmobile Alero GL 2.4L Misfire VIN: 1G3NL52TX1
customer brought the car in ,said it has been doeing this for about 4 mo. when it is ideling it will intermit. skip you can here a slight pop pop out of the exaust. it will idel for moment do the the same thing ,raise the rpm a little it don,t do it. runs down... Trouble codes: P0300
1998 Pontiac Firebird 3.8L Excessive Emissions, Stall VIN: 2G2FS22K9W
This thing came in running rough and lots of smoke,no codes. unplugged the maf and it cleaned out and ran good. Replaced maf with reman.and no change shoes 20 to 25 gps. at idle the second reman shoes 65 gps at idle and it died right away. What is the normal h...
2006 Pontiac G6 GTP 3.9L Misfire VIN: 1G2ZM15166
This G6 came in with misfire and trac light coming on. Upon inspection found CEL did not work and the trac light was coming on due to fault in pcm. Found random misfire and catalyst efficiency code for bank 2. Traced misfire back to #2 being a dead misfire. Co...
2006 Pontiac Torrent 3.4L Unknown VIN: 2CKDL63F46
Intermittantly after the vehicle is warm this vehicle has a very long neutral to drive engagement time, approx 3 seconds. I have uploaded some pressure waveforms that somebody may find interesting, feel free to comment on what you think the problem could be or...
2003 Saturn Vue 3.0L air condition VIN: 5GZCZ53B33
As soon as you turn on the ac with the engine running the security telltale illuminates and the ac clutch cycles in sync with the security telltale. All wires to and from ac relay to the ecm and ac clutch intact without shorts. Checked bcm and ac controller fo...

Fixes & Summaries for GM
Fix/Summary Answers
1988 Chevrolet C1500 Cheyenne 5.7L Excessive Emissions VIN: 1GCDC14K8J
Well after two ecu's we finally got grnd to the grey wire feeding the egr control valve. replacing the neutral switch on the colum didn't seem to effect the system. thanks to all that replied. with grnd to the egr and it working we were able to reduce the nox...
1999 Chevrolet Silverado 1500 5.3L driveability VIN: 2GCEK19TXX
Hello, aparantly my Modis had a problem with this vehicle. I borrowered a Solius and was able to read codes and data with the key in the run position. Therefore I was able to do a crank learn. Thanks for all the help. Jeff
2001 Chevrolet Cavalier LS 2.4L harsh shifts VIN: 1G1JF52T71
thanks for all the help replaced the sensor and the harness with ome parts. all shifts are normal and no codes. just a note the dwd part was defective and looking back in our rec. we have had a high come back rate due to these parts mainly in critical aeras....
2004 Chevrolet Blazer LS 4.3L Hesitation, Cuts out, MIL Lamp on VIN: 1GNDT13X54
Thank you to all for your replies.The problem was clogged cats.Customer did authorized to replace and did so.Didnt wont to go any fether why it clogged.He did own intake gaskets and didnt change oil.Said when torque intake down bolts were breaken only to find ... Trouble codes: P0300.
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