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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 28, 2006
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Open Help Requests for GM
Help Request Answers
2000 Buick Regal LS 3.8L HVAC Controls VIN: 2G4WB55K3Y
This car came in with customer complaint of intermittently blowing hot air, no display on HVAC head unit and not being able to turn the blower motor off. We replaced the head unit with a junkyard part and it worked fine for a few days. Customer came back and w...
2001 Buick Century Custom 3.1L headlights VIN: 2G4WS52J01
car came to us with headlights on at all times, ( cust states that at times when car is parked the horn will sound and one time when driving the cruise came on and acclerated to 90 mph and could not be turned off, I have not seen these problems)tested for bcm ...
1974 Chevrolet Corvette 5.7L hydralic
Hello fellow techs, this one should be simple but is kicking my butt, I must be over looking something.A good customer with an easy going personality and a fat wallet talked me into installing his recently purchased power brake conversion " kit" which turned o...
1991 Chevrolet Corvette 5.7L No Start, Stall VIN: 1G1YY3381M
Need help and direction. Car died-towed in. After cooling down ,runs great untill hot agin. I got no fuel pressure- but also had a loss of injector pulse. We tested ECM- the new ecm fixed a inop a/c compressor,but not the problem. We checked and cleaned ground...
1994 Chevrolet K3500 Cheyenne 7.4L Hesitation, Surge, Misfire VIN: 1GCHK34N2R
We have a 1994 chevrolet k3500 with a 7.4 litre. The vehicle runs very poor when the alternator is connected. We have changed the alternator this made no difference. We checked for a/c ripple as if it had a bad diode and there was none. We have isolated the ch...
1998 Chevrolet S10 LS 4.3L engine VIN: 1GCDT19X4W
This 4.3X engine needs replacing. There are very few 4.3X engines but plenty of 4.3W engines. The salvage yards tell me that they have a footnote that the 4.3W engine has a 'performance cam'. Does anyone know if by swapping intake and exhaust manifolds will th...
2000 Chevrolet Silverado 1500 5.3L r.f. wheel sensor VIN: 2GCEC19TXY
truck came in with code co223 rf wss erratic or faulty about 1 month ago.could only duplicate problem once and replaced rf wss hub assy.on her way home yesterday abs light came back on same code.test drove vehicle about 15 miles trying to duplicate problem and...
2003 Chevrolet Impala 3.4L fuse for dr lock VIN: 2GIWF52E93
The dr lk fuse will blow in this vehicle in a time frame from 2hrs to 6hrs. This fuse powers the bcm. The fuse will not blow if i remove the c1 pink connector from the bcm, this is the 24 pin connector. I have removed all of the pins one at a time from this 24...
2003 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GCEK19U03
This truck misses heavy on cyl#3 and #4. we have scoped the ignition and coils and injectors, all look normal. we swapped 2 plugs, wires, injectors(not plugged at all). To no avail i can not find out what is causing this miss at idle. It runs perfect on the hi... Trouble codes: P0300
2003 Chevrolet Impala LS 3.8L bcm VIN: 2G1WH52K53
ihave a 03 chevy with the security light on ,service vehicle soon light on the message center and the radio locks .i have a u1000 code los of class 2 serial com.in the history only .no codes in presant.ever thing is intermitting.the data on the modis says the ...
1992 Oldsmobile 88 Royale 3.8L No Start VIN: 1G3HN5316N
Hello, Car was towed in last week for dying on the road. Next day started up and ran fine. Died shortly after. Did this for most of the day. Next day would not start. Tapped crank sensor and fired up. Drove into shop and put on lift. Tapped crank sensor and c...
1998 Oldsmobile Achieva S 3.1L Ignition Lock VIN: 1G3NL52M9W
Vehicle came in with customer complaint that she couldn't remove the keys from the ignition, though able to shut engine off. When first pulled in to the shop, noticed when engine was shut off, indicator lights stayed on and key would not return to off position...
2001 Oldsmobile Aurora 3.5L dies when put into gear VIN: 1G3GR64H21
car came in for a die concern. checked dtc's. only found trans dtc. test drove to check for concern, put in reverse car dies. on test drive no problem found. does not die when coming to stop.only after start up and put into gear.
1990 Pontiac Bonneville LE 3.8L Cuts out, Stall, MIL Lamp on VIN: 1G2HX54C6L
Vehicle stalls after take off, Check engine light comes on and goes off while driving. Sometimes it runs fine for miles until car is stopped and on take off will either stall or hesitate badly or drive fine. Check engine light comes on and it drives well light... Trouble codes: 34 (Mass Air Flow sensor Circuit Gm/SEC Low)
1992 Pontiac Grand Am SE 2.3L No Start, starts bucks n dies VIN: 1G2NE5433N
This car almost starts bucks backfires and dies. Another shop diagnosed this as a timing chain. The timing was perfect and acceptable play in the chain. scoped ignition pattern with injectors removed from the loop was excellent. injectors were ohmed and all we...
1992 Pontiac Grand Am GT 3.3L Cuts out, Stall VIN: 1G2NW14N7N
Hi Group, Customer came in saying car is cutting out when braking.Car runs great down the road until brake pedal is pushed.Even cruising along 45 mph & slightly touch the pedal,the engine goes to missing & cutting out.In the shop it will do it in park & neutra... Trouble codes: 26 (quad driver module), 27 (2nd gear switch), 28 (3rd gear switch)
2002 Saturn Vue 3.0L No Start, MIL Lamp on VIN: 5GZCZ63B22
Hi fellow techs. This Saturn has really got me spaced out.Its Making my head go into orbit. The thing came in with no coolant in it. The customer said the fan was running to often and the low coolant light was on. We found leaks at the lower radiator outlet ma... Trouble codes: P0206

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Roadmaster 5.7L No Start VIN: 1G4BR82P8S
thanks to everyone for the replies. thomas from new jersey wins the prize for this one. although the vehicle had spark using the spark tester, it was not a good enough spark to fire the plugs while cranking. replaced ignition coil and the vehicle fires right u...
1998 Buick Park Avenue 3.8L sluggish VIN: 1G4CW52K2W
This has been an ongoing search and not find problem. But finally we have found it. ALWAYS go with your first hunch. When this new Jasper engine started the first time I told my techs that it sounded like it was out of time. They told me it couldn't be because...
1988 Chevrolet Astro 4.3L Surge, Stall VIN: 1GBDM15Z3J
Installed new distributor. Started suging about 10 miles into test drive but not as bad. Brought back to shop reset timing and now doesn't surge customer has been driving for a month now.
1988 Chevrolet Corsica 2.0L No Start VIN: 1G1LT5111J
Since my last request, we have checked grounds into computer. We haven't got the car back in the shop to check injector resistanc, but the injector fires if we tickle the signal going into the computer. Not sure when the car will be towed into our shop. Thanks...
1989 Chevrolet Astro CL 4.3L Belts VIN: 1GNDM15Z4K
Thank,s to all who replied,Most were correct with the bracket cracked behined the alternator.Thank you all very much,Great help.
1997 Chevrolet S10 4.3L Misfire, MIL Lamp on VIN: 1GCCS19X0U
Actually I have not fixed it but someone else did. To summarize the replies; Suggestions were to make sure there were good ignition parts installed, make sure the cam timing is close to zero and a few other misc. things such as EGR and Timing chain not loose. ... Trouble codes: P0300 (Multiple cylinder misfire).
1999 Chevrolet Silverado 1500 5.3L Hesitation VIN: 1GCEK14T0X
thanks to all that replied. tried all suggestions. nothing seemed to make any difference. customer took vehicle as it was. Trouble codes: P0137 (p0157-), P0157.
2002 Chevrolet Impala 3.4L Electric door locks VIN: 2G1WF55E12
Thanks to those who helped. Neither problem (door lock/trunk 20 amp fuse blowing or battery drain) has occurred since help request was sent 6/13/06. If anyone has experienced a similar intermittent problem please send it our way.
2003 Chevrolet S10 LS 4.3L security light VIN: 1GCDT13X43
i replaced the cluster and the light stayed off thank ever one who helped me
1999 GMC Jimmy SL 4.3L reverse VIN: 1GKDT13W4X
Most replys said to check the filter in the side of the pump. I had not put a filter in during the rebuild. I removed the pump and installed a filter. I put it all back together and tested. The deleyed engagement problem was solved but i still had no forth gea...
1996 Pontiac Sunfire SE 2.4L MIL Lamp on VIN: 1G2JB12T5T
I found the purple wire for the pcm to the dlc had no connection.Replaced the wire and problem fixed .Thanks to all that responded.
1999 Pontiac Montana 3.4L air bag VIN: 1GMDXO3EXX
I traced the wiring to the seat belt from under the drivers seat and did find the orange/black wire broke going to the seat belt latch . Thanks everyone for your help .
2002 Saturn SL2 1.9L No Start, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1G8ZK52732
This one did turn out to be the fuel pump - it would lose pressure when hot, and as it turned out it usually had 1/2 tank of fuel or less in it. It had originally lead us to believe it was ignition related due to the mis-fires randomly occurring on datastream ... Trouble codes: P1599, P1620, P0341, P0731.
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