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Prev Professional Automotive Repair Technical Discussions for March 12, 2007
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Open Help Requests for GM
Help Request Answers
2000 Buick Park Avenue 3.8L hard start VIN: 1G4CW52K3Y
hey guys this is a weird one vehicle came to us a few months ago with the typical hole in the intake we replaced upper intake manifold and fuel pressure regulator test drove vehicle and everything was just fine vehicle came back a few days later and the custom...
1993 Cadillac Allante 4.6L 1-2 shift VIN: 1G6VS3391P
2003 Cadillac Escalade ESV 6.0L Driver's Seat Heater VIN: 3GYFK66N83
Hi Gang! Got this piece of Cadillac here with a problem in the driver's seat heater. Turn the switch on, and in about 30 seconds, heater will kick off and will set code(B2425). Do have a TechII, and the module is seeing the proper inputs from the driver's door...
1978 Chevrolet El Camino 5.7L 2-3 shift VIN: 1W80L8Z478
automatic transmission no 2-3 engagment, and slips in reverse. i have been restoring a el camino and have gotten to the leaks. i pulled the transmission for a complete re-seal. replaced all the seals and bushings in the pump plus the sealing rings. the transmi...
1991 Chevrolet Astro CL 4.3L backfires VIN: 1GNDM15ZXM
this vehicle will backfire through throttle body on light accel under load while hot. cat isnt restricted. fuel pressure ok secondary ignition is good. any help is appreciated.
1996 Chevrolet Express 1500 5.7L all shifts
Hey guys i got a Express van that cust states the trans has been rebuilt about 40,000 miles ago. if drive it short distances, no problem withe trans. Drie it about 20 miles and it will not even pull off. Sound like gears grinding and severe slipping. Let it si...
1998 Chevrolet Tahoe 5.7L noise tensionor or belt VIN: 1GNECI3R5W
I appreciate any idea I can get on this 1998 Tahoe. There are no oil leaks on the belt,all the pullies are free to turn and seem to be stright and in alignment with each other. The tensionor makes a tic tic noise ,by simply changing the belt the noise goes awa...
1998 Chevrolet Cavalier 2.2L No Start, Cuts out, Stall VIN: 1G1JC1249W
This was towed in late Saturday as a no start. Sat inside all weekend and was a no start first thing this morning. I had no spark and was unable to hear fuel pump, maybe just too much noise in shop. I was in proccess of hooking up my fuel pressure gauge and he... Trouble codes: B1011 (VTD short this ignition cycle), B1012 (VTD bad R-Code this ignition cycle), B1013 (VTD bad timing this ignition cycle), B1021 (Loss of PCM serial data), B1022 (Loss of SIR serial data), B1023 (Loss of ABS serial data)
1999 Chevrolet Silverado 1500 5.3L door locks VIN: 1GCEK19T7X
customer has a 99 silverado that he is trying to sell. the doors uesd to lock at 15mph and unlock when the key was removed. now after replacing the battery this no longer happens. also the rke was inop. the fob had a dead battery so i tried replacing the batte...
2003 Chevrolet Silverado 3500 6.6L no compressor operation VIN: 1GCJK33173
Vehicle came in with complaint of intermittent a/c operation, we found no compressor operation at all. Problem is I cannot get scan data from the hvac module, I can get trouble codes, had no codes stored but will set codes if ambient temperature sensor is disc...
2004 Chevrolet Silverado 2500 HD 8.1L CD player VIN: 1GCHK29G54
Thanks in advance for the help folks. We replaced the instrument cluster and then had the dealer re-program the unit. After this procedure, the customer tells us the 6-disc changer no longer works. We did not have any of the sound system out for any service. ...
1995 GMC white/volvo 10.6L fan VIN: 4V1WDBDF2S
okay guys and gals, time for some "experienced advice". this truck cooled quite well for the last 8 months but now is back with a high side hose blown off and the drier plug melted out...I have to assume the fan clutch failed to engage and/or hi pressure switc...
2001 GMC Savana 3500 5.7L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1GTHG39R41
hey fellow tecs i need help. this gmc savana 5.7 is giving me gray hair anyways i have a misfire on #5 and #7 changed plugs cap and rotor, first a standard motor cap then (ac delco) installed reman distribtor, scope patern was as good as it gets, replaced 5 & ... Trouble codes: P0300 (random misfire)
2002 GMC Yukon SLE 5.3L abs VIN: 1GKEK13Z22
Hi guys,I would like to thank you for your help and interest in my problem.This truck goes into ABS mode at about 8mph,I checked the ealier posts for pad and rotor problems,I put you pads and rotors on all four corners.Also I did check for the rust build up un...
1994 Oldsmobile 98 Regency 3.8L No Start, Cuts out, Stall, MIL Lamp on VIN: 1G3CX25LXR
Hello all, Thanks for reading my request and any help you can give. This car was just purchased by the customer about 4 weeks ago so the only repairs he knows about are mine. It came in with a TPS code P0123 and I replaced the Tps 3 weeks ago. The TPS screws ... Trouble codes: P0123 (TP Sensor Circuit High)
1995 Pontiac Sunfire SE 2.2L MIL Lamp on VIN: 1G2JB5247S
Vehcile has had a recuring egr code. 32 customer complained of surge, and miss that we could not duplicate. After multiple tests, egr valve, and sol where replaced. Egr flow was tested, no aparent blockage. On third attempt found that when scanner was attach... Trouble codes: 32 (egr)
1997 Pontiac Grand Prix GT 3.8L Alternator VIN: 1G2WP52K2V
Hi everyone and thatnks in advance for the help. I have an odd charging system problem here. Car came in with a bad alternator (not charging) battery was discharged (new). Recharged and tested battery. (tested good) replaced alternator with rebuilt delco unit....

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Century Limited 3.1L left front turn signal VIN: 2G4WY52M8W
Hi all, Thanks for the fast response. it indeed looks like a bad miltifunction switch with a voltage drop through the left frt t/s circuit. I guess we missed the voltage drop initially since we had a signal with the module disconnected. Oh well sometimes we vi...
1993 Cadillac DeVille 4.9L Excessive Emissions VIN: IG6CD53B9P
I finally had to admit defeat & get on to the parking lot full of decent work. The customer had finally decided to take the car to the dealer. I tried & tried to find ANY outside source for the extra fuel, i.e. blown fuel regulator, leaking canister purge, t... Trouble codes: P091.
1997 Chevrolet K1500 5.7L steering VIN: 1GH6R534W3
well after replacement of the pump and steering box the problem when away now was it the box or the pump at this point i am just happy that the plow truck is back on the road
1998 Chevrolet Blazer 4.3L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GNDT13W9W
Well thank you everyone for the reply's Unfortunetly this is my 1st 1 that i couldn't fix.I tried every idea and it still did the same thing.I'm thinking it might be in the valve train but the customer won't pay if i don't fix it. Trouble codes: P0151, P0300.
2000 Chevrolet Blazer LS 4.3L transfer case VIN: 1GNDT13W1Y
thanks for the help, a new fork in the transfer case fixed the problem.
2000 Chevrolet Venture 3.4L MIL Lamp on VIN: 1GNDX03E2Y
our problem ended up being crakn pully not pressed in all the way and causing ring not to line up with crank sensor.replies ranged from crank pully not pressed in all the way to crank relearn to air gap between ringtone and crank sensor.every one of the repyli... Trouble codes: P0336 (testing and results).
2000 Chevrolet Suburban 1500 LT 5.3L Instrument cluster VIN: 3GNFK16T7Y
Well guys this one is fixed! I did send in the cluster and I got it back today. They told me it would be a week to ten days but it only took just a few days. To answer Lee's question I did put a good battery in it before I sent in the cluster and that did not ...
2004 Chevrolet Trailblazer EXT LT 4.2L exhaust manifold VIN: 1GNET16S74
Yes, the shortcuts used on th colorado 3.5l also work on the 4.2l. We also had to change the cam actuator because of a p0016 code. We found that the 2004 and 2003 models are having problems with the actuator, a design change tooks place in 2005. Thanks to ever...
2000 GMC Jimmy Diamond Edition 4.3L Stall VIN: 1GKDT13W3Y
Due to customer $$$ & scince the customer bought the vehicle only 6 months ago from a local dealer - they have decided to go back to dealer for problem. Tried to monitor fuel & ign. but as I stated would shut down without warning and restart as if no problem t...
2000 GMC Jimmy Diamond Edition 4.3L Front Wheel Bearings VIN: 1GKDT13W8Y
Thanks to everybody who answered my post. There were a lot of opinions on which bearing worked the best. We do have a SKF bearing on right now. If this problem persists,(which will probably happen) we will try first OEM, then Timken, then Bower/BCA. Also there...
2003 Oldsmobile Silhouette Premiere 3.4L master cyl VIN: 1GHDX03E13
Thanks for the help guys. In most of the replies I was told about GM's way of bleedding these brakes using the rr, lf, lr and rf method. I re-bled the brakes and have not seen the customer again. The brakes felt the same to me but if the customer is satisfied ...
1999 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 1G2WP52K8X
this car is fixed. i run a resistance check on the knock sensor wire from pcm to sensor and found that the wire was open at the backend of connector.this is the connector at the power steering had got on the axel and rubbed it into.thanks to everyonean... Trouble codes: P0332.
2000 Saturn SC2 1.9L Clutch VIN: 1G8ZR127XY
Well, this one taught me something, and also humbled me a bit. Many techs had the excellent idea of a shifting crankshaft- but it only had .004' end play. Others suggested lengthening the slave application rod (but I had already done that and had made no diffe...
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