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Prev Professional Automotive Repair Technical Discussions for February 19, 2008
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Open Help Requests for GM
Help Request Answers
2001 Buick Park Avenue 3.8L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Poor Fuel Economy, MIL Lamp on, RUNS RICH VIN: 1G4CW54K41
The readings of oxy. sensor are .900+ and the fuel trim is -18 @ idle but the injector pwm is 10 ms. Will set code p0101 at times. Car will stall @ idle. The car runs good and all the readings ( i.e. M.A.F., O2, INJECTOR PWM) are right when the level ride moto... Trouble codes: P0101 (maf)
2002 Cadillac Escalade 6.0L power side view mirrors VIN: 1G1EK63N42
truck came in month ago with inop side view mirrors and seat memory. replaced body module, and mirrors came to life and seats were able to be controlled. now comes back and passenger side mirror will not adjust properly and originally when put in reverse, the ...
1992 Chevrolet Lumina Euro 3.1L No Start, Poor Idle Quality, Surge, Misfire VIN: 2G1WN54T3N
Hi this car came in running very rough, wouldn't idle without help. No codes and data stream look normal when running except rich. checked injector resistance and all were high 13.8 or so. Ordered a set and installed along with new set of plugs. Started and ru...
1994 Chevrolet C2500 5.7L fuel system VIN: 1GCFC24H2R
The vehicle first stalled on the highway. Made it to shop and when attempted to turn over, negative start. Cranked but no start, the fuel pump is kicking on. But it doesnt appear that the fuel is making it to the TBI. Any help would be a help.
1998 Chevrolet Astro 4.3L intake manifod VIN: 1GNC12ACK2
hi gm techs.I have a 1998 chev. astro van in the shop.PO 125 code.check engine light is on.coolant takes to much time to heat up.Did cooling system pressure check and found lower intake manifold leaking coolant.Do these 4.3 liter engines have a history of leak...
1999 Chevrolet Corvette 5.7L Mechanical VIN: 1G1YY32G3X
Car came in run no go (trans) Cust told needs flywheel. As far as I can make out, engine output seems there. It's like the driveshaft coupler in broken?? I can spin the T/Q by hand. I don't hear any noise. No codes and weird. I have not pulled apart anything. ...
2000 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNDT13W3Y
This blazer keeps setting a P1404 code every couple of days. I replaced the EGR valve with a Delphi unit from NAPA but the code continues to set. The modis shows 0.75 volts KOEO and about 1.37 volts KOER. All other EGR positon data(desired, duty cycle, and %)a... Trouble codes: P1404 (EGR Closed position)
2001 Chevrolet Silverado 1500 4.8L Connecting rods VIN: 2GCEK19V31
Hi Fellow Techs, I have a strange one. The owners truck was towed in rapping with a hole in the left front side of the block. Upon disassembly I found # 1 & 2 connecting rods broken in half. Light markings on the piston domes from exhaust valves. (Probably pu...
2002 Chevrolet Venture LS 3.4L No Start VIN: 1GNDX03E62
thanks for any help that anyone offers in advance thank you history : owned by same ind for number of years no problem then on trip died was able to restart made home after a few more stops died at home never ran since . towed in did many checks found no pulse... Trouble codes: 1336 (crk relrn not done since comp replaced)
2002 Chevrolet S10 4.3L Cuts out VIN: 1GCCS19W42
Hey guys and girls.I'm posting for a friend who called me for help.We have this 2002 s-10 that consistantly cuts out right at 3000 rpm while driving and the scanner is reading 10,000 to 12,000 rpm.No codes present.Have changed the crank sensor and no change.So...
2002 Chevrolet Monte Carlo SS 3.8L crank circuit VIN: 2G1WX15KX2
Car will not start or crank. Happens intermittently without warning and no codes. If waiting for 15 minutes (sometimes longer) will start. All other elect. components working properly. Dealer can not duplicate symptom. Battery was recently replaced which does ...
2004 Chevrolet Blazer LS 4.3L speedometer/ a.b.s.
Blazer came in for no shift fron 2nd-3rd gear. Test drove and 1-2 shift ok 2-3 shift is verry late as if hard on the throttle at normal driving. the speedo also fluctuates at 30 mph to 55 mph. checked codes found c0237 rear speed sensor erratic voltage scaned ...
2005 Chevrolet Uplander LT 3.5L door closer VIN: 1GNDX33L75
Power sliding door was replaced by a body shop nearby. The problem is when you push the button to close, the door closes but when latching the door pops open about an inch only on the rear. When the door closes you still hear the motor going until it pops open...
1999 GMC C3500 Sierra SL 6.5L oil contaminated, coolant loss not external VIN: 1GDKC34F8X
Before I go any further I should say this ole girl runs like a champ other than the blue smoke at idle and decel as well as coolant loss. Any input would be appreciated, We've checked all the obvious "we think" , we haven't seen any increase in coolant temp wh...
2002 Oldsmobile Alero GL 3.4L tcc VIN: WV2KB47092
This Alero will surge/slip while under a slight load like inclines. I have driven it extensivly and graphed the relevent engine sensors while this happens. (MAF, O2s, TPS, and so on) with the genysis in selective datastream mode. I only had 3 pids going at onc...
2002 Oldsmobile Silhouette Premiere 3.4L Mechanical VIN: 1GHDX23E62
This vehicle had the oil changed 1300 miles ago. It was towed in with oil running out of it. After inspecting, we found a gasket sticking out from behind the oil filter. Suspecting there were two gaskets, we removed the oil filter. There was only one gasket. S...
1999 Pontiac Grand Am SE 2.4L MIL Lamp on VIN: 1G2NE52T8X
Customer complaned there was a noise like something was dragging under the rear of the car. She stopped immeadiatly and looked. Nothing was found. Noise was gone. Mil on previous to this noise. Road tested no noise and light went out for a short time while wai... Trouble codes: P0452, P0453
1997 Saturn SW1 1.9L Misfire, MIL Lamp on VIN: 1G82H8288V
The check engine light is on with code P0302B. After looking at Data Base Injector cleaner with Techron has been run thru it several times. The car is due for emission test. After clearing code I can watch misfires for cyl 2 increase on scan tool. There doesnt... Trouble codes: P0302 (cyl 2 misfire)

Fixes & Summaries for GM
Fix/Summary Answers
1982 Cadillac Eldorado 4.1L MIL Lamp on VIN: 1C6AL5784C
Looks like the car is fixed. I checked the oil pressure switch wiring like a few of you mentioned (looked good) and replaced the switch since I was in there. Same condition as before. We thought it might be a faulty alternator. Installed a new unit, same as be... Trouble codes: 20 (Open Fuel Pump Circuit).
2000 Cadillac DeVille 4.6L Surge, Misfire, MIL Lamp on VIN: 1G6KD54YOY
i smoke the intake & Found throttle body to the intake gasket leaking thanks to every one for there help for real guys thank very very much
2006 Cadillac CTS 3.6L caliper bracket VIN: 1G6DP57736
Four replies, One reply new of a unreleased bulletin for replacing the caliper bolts. Other replies suggested brakes may have been done and caliper bushings not installed or damaged. I called dealer three times with no return call. (frustrating) Brakes had nev...
1996 Chevrolet Blazer 4.3L Brake Lites VIN: 1GNT13W3T2
Found two problems. An existing hot wire at trailer wiring which was for an 8 pin conector grounded itself to the frame rail. This is why when checking my 4 wire conector i found no problem. #2 The signal wire to the turn signal switch that runs behind the da...
1997 Chevrolet Malibu 2.4L Stall VIN: 1G1ND52T1V
Thank you to all for your tremendous help. We finnaly pinpointed the problem. Alex and Chris were right on about the map line, but what we found was the little nipple on the map sensor was broke off. So we installed new map and NEW vacuum lines. The car runs g...
1998 Chevrolet K1500 Cheyenne 5.7L No Start, Stall, Misfire, MIL Lamp on VIN: 1GCEK19R5W
THANKS TO ALL WHO HELPED!!! I can now fairly comfortably say that the vehicle is fixed now. It ended up being the distributor that caused it. After so many responses that the distributor wouldn't cause it not to run i guess i had a fluke come through here. I d... Trouble codes: P0300.
2000 Chevrolet Silverado 1500 4.3L evap monitor not run VIN: 1GCEC14W7Y
Thanks to all who responded! I remembered reading the info about the fuel level as soon as I read some of the replies (although it doesn't give you that info in Alldata with the drive cycle). When I got the fuel level under 3/4 tank the monitor ran & all is ...
2002 Chevrolet Silverado 2500 6.0L Pedal Height VIN: 1GCHC23U32
I hope this truck stays fixed. We installed a used ABS unit, both the solenoid pack and the hydraulic section that bolt up to the driver's side frame rail. The customer has driven the truck a couple of weeks without incident. One week without a trailer, and ...
1994 GMC K2500 Sierra SL 6.5L Surge, Cuts out VIN: 1GTFK1953R
Thanks to Christopher from Ohio who said it needed a pump. This fixed 90% of the problem. It still would set TDC offset codes after replaceing the pump. After digging through alldata some more we found that the timning chain was too loose. Replaced timing chai... Trouble codes: 88 (TDC Offset Error).
2000 Oldsmobile Bravada 4.3L all wheel drive light VIN: 1GH8T13W7Y
A new encoder motor fixed this one. Also, you cannot manually move the fork as that is the way it is designed. Thanks.
1996 Pontiac Grand Am SE 2.4L starter engages VIN: 1G2NE52T5T
Hello everyone. Thanks for the help on this vehicle. Problem was the neutral switch. It is located directly under the master cylinder. We pulled the switch off of the trans, and it was full of water and brake fluid! Installed a new switch, now car will start a...
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