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Prev Professional Automotive Repair Technical Discussions for November 23, 2007
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Open Help Requests for GM
Help Request Answers
2000 Cadillac Catera 3.0L Alternator VIN: W06VR54R6Y
alternator is over charging, replaced alternator,positive cable is getting very hot to the touch have checked all ground connections, all positive connections, all have been cleaned and reattached still doing the same added a ground wire from battery to the bl...
2004 Cadillac SRX 4.6L Suspension VIN: 1GYDE63A24
Greetings Fellow Techs, Got a strange one in today. 2004 Cadilliac SRX-when traveling down the road and in no set pattern, the display will read "Stability System Engaged" The driving habits of the vehicle don't change and after a short time the message will g...
2007 Cadillac DTS 4.6L Charging VIN: 1GEEH96Y47
This Caddy after driving for while will start to show a loss of charging voltage. The charging rate will vary from 12.5 to 14.5 volts When this occurs the accessories start to shut off and the low tire monitor system light comes on. There are no other problems...
1996 Chevrolet Blazer 4.3L Timing VIN: 1GNDT13W6T
Look guys and gals I am a Toyota tech but my boss says I am the tech period " NOT!!! " Please keep in mind this thing is not stock, but right now the aftermarket turbo is removed, nitrous is diconnected, all aftermarket timing cheats are removed, valve timing ...
1997 Chevrolet C1500 Cheyenne 5.7L heater core, VIN: 2GCEC19R1V
Well this is one I have never seen before. This pickup usually at lower speeds will start making a loud almost banging noise under the dash. I am sure know that it is the heater core. We pulled the cover and if you put your hand on it you can feel it right at ...
1998 Chevrolet C3500 Cheyenne 6.5L Heater VIN: 1GBKC34F2W
This truck defrost does not switch on. AC does not work also. All other controls work I've checked everything I know to check. Everthing is new!If u ground the white wire the defrost will work then but I know my grounds are good.
2001 Chevrolet Silverado 2500 HD 6.6L Surge VIN: 1GCHK23161
this vehicle came in 1 week ago extremely noisy at idle checked for codes maf sensor voltage high replaced maf monitored pids found frp at idle was 26000 psi replaced frpr on pump with new one from dealer unit ran fine performed service for customer and they w...
2003 Chevrolet Silverado 3500 6.6L front end VIN: 1GCJK33113
This truck has a grind and severe vibration at low speed. We have replaced both wheel bearings, all 4 ball joints, and the mid shaft bearing. The vibration is there on accel and decel. I have shifted the truck in to neutral and let the truck coast to a stop wi...
2003 Chevrolet Silverado 2500 HD 6.6L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1GCHK23113
GUYS I need some info an derection here. This 6.6 has codes p0087/p0089/p1093. An runs very poor 40 mph tops. I checked the fuel press at test port 2 psi vac. I have a tech2 scanner an reading the actual fuel rail press. koeo is 203.3 desired fuel rail press. ... Trouble codes: P0087 (P0087 for fuel rail pressure too low.), P0089 (The difference between actual and desired FRP is more than 20 MPa), P1093 (The difference between commanded fuel pressure and actual fuel pressure is more than 20 MPa.)
2004 Chevrolet Silverado 2500 HD 6.6L power loss over 2000 VIN: 1GCHK23164
We have scanned, checked all available data against what we have from Mitchell and Alldata. Unable to find a clue as to problem. high idle switch already checked. The biggest problem is the vehicle is here on an island, with a load in it making it impossible t...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52J43
Thanks to all who replied. Some were concerned about plugged passages, which has nothing to do with this code. When we check at the PCM for ground when commanded, it was there. Traced harness back toward EGR and found a spot near the left strut mount where the... Trouble codes: 0403 (EGR circuit malfunction).
1995 Chevrolet K1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1987KLV84Y
Wow, You all were guessing with me!!! Ha. Well, guessing would be rightfully so when you see what was wrong with this beast. I read the replies that I had received this morning and took that under my belt as I went to work. I had already decided that my first ...
2000 Chevrolet S10 2.2L squeeling noise VIN: 1GCCS1954Y
Thanks to all that sent ideas, I learned alot. Well, I knew this was wierd when I started, and I was not disapointed. After I sent the original message I noticed an exhaust leak getting louder. Turns out the exhaust manifold had four studs missing on the botto...
1996 GMC K3500 Sierra SL 6.5L Glow Plugs
Due to the possibility of head removal the customer decided that using the block heater this winter would be better than fixing it. I did get great responses however, if I do repair this I will try using a pipe over the glow plug with a torch, then rapidly coo...
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