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Prev Professional Automotive Repair Technical Discussions for April 10, 2006
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Open Help Requests for GM
Help Request Answers
1989 Cadillac DeVille 4.5L climate control VIN: 1G6CD5154K
Hey Guys, Customer brought in this cadillac complaining of no speedometer and no climate control function. Someone had tried to replace the radio and it was removed. All of the wires to the radio had been either stripped back or cut loose from their original ...
1996 Cadillac Fleetwood 5.7L Misfire, MIL Lamp on VIN: 1GC6DW52PO
This motor was put in Florida about 2 weeks ago. It came in for a p0300. Found that the egr valve was coming on way to soon and creating the misfire. If I unplug the vacuum line to the egr valve, the misfire is not present. In drive, under very slight accelera... Trouble codes: P0300
1988 Chevrolet Nova 1.6L system does not charge and lights are on dash for VIN: 1Y1SK5143J
This vehicle came to my shop with alt. and brake light on. The customer had already changed the alt. I tested for power at alt. plugin.It has power on all the wires except the yellow w/ white in plugin. It lites the test light dimly until you plug in the alt. ...
1991 Chevrolet C1500 Cheyenne 5.7L Clutch fork VIN: 1GCDC14K9M
Hi all, sorry for posting such a lame request, but I am at my limit on this one. My students are replacing the clutch on this 2wd pickup. Everything has gone well until we got to the release bearing. I cannot see how the clutch fork comes off so the bearing ca...
1992 Chevrolet Corvette 5.7L a/c blower VIN: 1G1YY23P0N
Looking for help on this one. 1992 corvette-the a/c compressor operates normally but the blower is inop. I tested powers and grounds to the power module,control head and the body control module. There is a code for serial data(i don't remember the number and t...
1994 Chevrolet C2500 Suburban 5.7L Poor Idle Quality, Misfire VIN: 1GNGC26K5R
This truck came in for running rough at idle and still has the same symptoms. Serious Engine misfire which can be felt through the whole truck and gets worse as engine temp increases butis still noticable when cold but very minor. Distributor was replaced due ...
1995 Chevrolet S10 LS 2.2L Poor Idle Quality, Misfire VIN: 1GCCS1940S
we recieved vehicle after failing emissions.the vehicle had a miss and failed on all three on the emissions.we found a bad plug wire and a sticking injector.we replaced injector and plug wires and vehicle runs great but still fails emissions.replaced cataltic ...
1999 Chevrolet Silverado 2500 6.0L oil consumption VIN: 1GCGK29U1X
vehicle returned with just under 2000 miles since oil change and pcv valve. customer added 1 qt. and we added 2 qts. for a total of 3 qts. no visable leaks, no smoke from exhaust. let sit for 4 hours and started with no smoke. vehicle is driven by 17 year old ...
1999 Chevrolet Blazer 4.3L battery drai VIN: 1GNDT13W1X
I have a battery drain. One problem is this thing is 4x4. when I disconnect the battery hook up my DVOM in line on the milliam scale, the module for the 4x4 on the passenger kick panel constantly goes on and off, same as if I use a test light. I had to unplug ...
2000 Chevrolet Impala LS 3.8L 4th gear VIN: 2G1WH55KXY
This transmission will neutralize on 4th gear deceleration. When cruising at freeway speeds engine rpm will drop to 1000 when you lift off the throttle. There is no resistance, the car will just frewheel, feels like it is in neutral. When you step on the throt...
2002 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEC14W82
Vehicle came in not running..found no fuel pressure..power at tank.replaced with new and shipped . nice and easy...Week later vehicle comes in on wrecker..test fuel pressure..none..test power at tank good...replace with new ACdelco unit again.vehicle runs 2 we...
2002 Chevrolet Blazer LS 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNCT18W72
Blazer came in with check engine light was off and customer stated light comes on at times and sometimes it idle funny.Test drove blazer and is running okay.Checked codes and got po131,po171,po300.Check freeze frame and got freeze frame for po171.The fuel trim... Trouble codes: P0131, P0171, P0300
2004 Chevrolet Impala 3.4L No Start VIN: 2G1WF52E84
When the car does'nt start it has no spark. There is nothing consistent other than leaving it cool off for a bit then it starts again. It will run once its started and will not leave you stranded. I have wiggled the harness, repaired 1 ground and inspected the... Trouble codes: P0443, P0645, B1440, B2587, B2964, B3128
1995 Oldsmobile Cutlass Supreme SL 3.1L signal lights VIN: 1G3WH52MXS
May seem a bit amature but i cannot locate the signal flasher , pulled glove box, radio, heater controls , left side under driver side covers--- some say under hood, does not appear to be there , rest say under drivers side above steering column but either i a...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Rendezvous CX 3.4L Steering VIN: 3G5DA03E22
Thank You for all that sent replies. I Replaced the front hub assemblies with Origanal equiptment And all is woring fine. Thanks Again, Dan
1998 Cadillac DeVille 4.6L Stall VIN: 1G6KD54Y1W
Thanks to everyone who replied. Pretty much everyones ideas i already covered. I went over this car again and drove it for 160 miles and could never get the car to stall. I did eventually get the car to ping and miss on accelleration. (intermttent). I checked ... Trouble codes: 1599 (engine stall/cc power mngmt).
2003 Cadillac Escalade 6.0L reverse warning leds
The help offered by the people who replied was invaluable. The diagnostic connector was found under the right center seat. The connector was taped to the harness, and the seat needed to be removed to access it. No big deal, just 4 bolts, then reach under the c...
1992 Chevrolet Corvette 5.7L No Start, Hesitation, Cuts out, Stall VIN: 1G1YY23PXN
after running alltests again it all lead us back to computer replaced computer for the second time and fixed problem.the first computer we got was bad Trouble codes: 16 (low resolution pulse fault), 42 (est error).
1992 Chevrolet Lumina Euro 3.4L Surge VIN: 2G1WN54X7N
Well this one is finally out of my hair. Most of the replies said check for power or ground problems at the computer as the customer may have jumped it backwards. I talked to the customer and he said that he had not jumped it backwards. After doing some checki...
1995 Chevrolet Astro 4.3L Misfire VIN: 1GDDM19W5S
Hi everybody,thanks for the excellent information.Three tranmsission solenoids had no power to them.The GAUGE fuse was blown & guess what,this fuse also feeds power to o2 sensor heater circuit.The o2 is 3 wire sensor,so if there's no power to the o2 sensor it ... Trouble codes: 66 (3-2 solenoid), 67 (torque coverter clutch solenois), 83 (torque converter quad drive).
1998 Chevrolet K2500 Cheyenne 5.7L fuel gauge VIN: 1GCGK24R6W
Thanks to everyone who replied! The fuel tank noise problem (sucking in) was the vent valve plugged by debris! First time I have run into this problem. Easy fix (thanks to the info!) by pulling off the cap and cleaning it. Fuel gauge problem (needle quiver) wa...
1998 Chevrolet Corvette 5.7L tire preassure sensor VIN: WISED65925
well i went to the dealer to do the relearn, with no luck, after diagnostic was perform at the dealer i was told i needed a new receiver and some wiring repair for the same circuit, of course i didn't buy it, i bought one new preassure sensor install it use my...
2002 Chevrolet Silverado 2500 6.0L temp VIN: 1GCHK29U82
Couldnt find the prob with the unit so we bought a junk yard unit and overhauled it and it works great thanks for all your help Jim
2002 Chevrolet Malibu 3.1L Starting VIN: 1G1ND52J62
thanks for all the replies and all the hard work we all do this car left with the dtc p1352 still present and the customer knows that it will probably need a pcm/bcm the no start condition is fixed and that is all the customer wanted at this time so i will cal...
2004 Chevrolet Silverado 1500 4.3L fuel leak VIN: 1GCEC14X64
Seems this is a common problem with vortec ngines using this injector setup. All 6 replies stated replacing injectors would resolve this issue so to further protect myself i replaced the housing at the same time. Customer opted not to go to dealer due to time,... Trouble codes: P0300.
1995 GMC Jimmy SL 4.3L No Start, Hesitation, Cuts out VIN: 1GKDT13W1S
This was unfortunately one of those cars thats been hacked up by a few others before i got to it. What was happening was that it would run great in park. But as i drove it it would immediately burn the coil. When putting the car in drive, the torque on the eng...
1996 GMC K1500 Suburban 5.7L take off VIN: 1GKFK16RZT
After much testing we found the 3-2 downshift solenoid to be shorted when it got hot. Thanks to all that replied! Jim
1999 Oldsmobile Alero GL 3.4L No Start VIN: 1G3NL52E1X
jim from maryland was right on, if i pull the fuse for the trunk release/radio amplifier the data comes right in and cluster works. there's no visible corrosion.but doing more testing on this fuse box/junction block with continuity when out of the vehicle, fro...
2000 Pontiac Bonneville SSEi 3.8L Radio inop VIN: 1G2HZ5410Y
All good replies, however none that helped fix this one. It was suggested that I reprogram a controller, there are 10 or 12 on this car. I did flash the PCM just because I could, and it didn't take that long, and I recalibrated the IPM (instrument panel module...
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