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Prev Professional Automotive Repair Technical Discussions for July 16, 2007
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Open Help Requests for GM
Help Request Answers
1994 Buick LeSabre Custom 3.8L 4 gear shift VIN: 1G4HP52L4R
I received car with shift problems 2-3. I have a good scanner and it clearly showed not shifting when driving.code 755 b solenoid. I replaced all solenoids. new filter, flushed system, cleaned a little sluge bottom of valve body housing. Now we have a tcc code...
1995 Buick Riviera 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G4GD22K95
Good afternoon to all, Riviera came in on hook for no start, I replaced the fuel pump and filter and It fired up and ran great. I checked codes because customer stated cel and traction light was coming on. Found PO131. I figured it was from the pump dying so I... Trouble codes: P0131
1987 Chevrolet Caprice 4.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1G1BL51Z7H
this car came to me with a severe hard start cold it would start and die untill it was warm enough then it had a very bad hesitation. i ck'ed the egr valve it is working i ck'ed for internal and external vac leaks none found. timing is ok @ 0 deg with the wire...
1995 Chevrolet Lumina APV 3.8L Closing VIN: 1GNDU06L5S
Hello all, I have got a 95 Lumina APV with passenger side power sliding door. Came in with door warning light on, system inoperative. No codes stored, performed reset and relearn proceedure (remove tail fuse 30 seconds then open/close door 4 times 5 seconds...
1997 Chevrolet Lumina 3.1L no start VIN: 2G1WL52MOV
good morning everyone i have a no start problem with security light flashing. my computer is down which i have mitchell on it. i need to know the ohms in the two wires coming from the lock key switch. there are no codes in the system thanks
1997 Chevrolet Camaro Z28 5.7L seal oi leak VIN: 2G1FP22PXV
hi techs, I replaced the timing chain and gear on this LT1 engine.Now,the oil is leaking from the waterpump drive shaft seal,it's seems the seal is too tight for the shaft.I ruined 2 seals so far,the lip keep getting fold over(I'm using Felpro brand).how you g...
2002 Chevrolet Silverado 2500 HD 6.6L Misfire, VIN: 1GCHK23162
need to know firing ordrer and cylinder locattion. left or right bank cylinder for cylinder #6 motor alldata does not show location
2003 Chevrolet Malibu 3.1L engine VIN: 1G1ND52J93
we have a problem that we never had before car runs perfectly fine after awhile you come to a stop you go to pull off and the motor sounds like its going to throw rods and bearings everywhere oil smoke fills the air from the exhaust it does this for a few minu...
2003 Chevrolet Silverado 2500 6.0L coolant VIN: 1GCGK29UX3
The customer was advised at a speedy lube that there was coolant in the oil.He took his truck home and monitered the oil level and coolant level,finding after driving 50 mi the oil level was up and the coolant level was down(aprox.1/2 litre).Upon pressure test...
2003 Chevrolet Impala 3.4L oil pump VIN: 1235885698
Hello, just looking for a fyi on this one. Has anyone seen this? 03 Impala with a 3.4. No oil psi?? Just cause it's a pain to change the pump, I pulled it apart to check the drive gear, dist. plug, and found it to be worn out. Like the old 88 -90 caddy dist. g...
2004 Chevrolet Express 3500 6.0L Misfire, MIL Lamp on VIN: 1GBHG31U44
hey guys. i am thinking i have a valve prob here? has any one run in to carbon build up on valve stems that keep them from closing? i have 130 lb on a crank comp test , and on a run test 0 lb with an ocational bounce in press. to 50 lb. when i rev it it will b... Trouble codes: P0307, P0300
1995 GMC K3500 Sierra SL 6.5L Stall VIN: 1GTHK39F0S
I have a wierd one here. This all started due to excessive black smoke due to the boost system not working. I cured all the problems there and now I have a problem with this thing wanting to stall under hard acceleration.It starts doing this after you drive un... Trouble codes: 62 (low boost pressure current code), 58 (TFT sensor circuit low history code), 73 (pressure control solenoid circuitcurrent error history code), 74 (trans input speed sensor circuit history code), 85 (undefined ratio error history code), 86 (low ratio error history code)
1999 GMC Sierra 1500 SLT 5.3L electrical system VIN: 2GTEK19V9X
this one's got me frustrated guys, any and all help is greatly appreciated. cust complains of battery light coming on in message center and prndl display going out, at the same time a/c quits working. the customer lives about 25 miles away and of course on the...
2002 GMC Envoy SLE 4.2L climate module VIN: 1GKDT135X2
hello went to re flash this climate module after replacing outside temp sensor. using tech 2 got to 3.7% and locked up. now module isnt seen on bus when requesting info. put new module in , updated tech2 . new module lit up and was recognized, started programi...
1999 Oldsmobile Intrigue GL 3.8L Cooling Systems VIN: 1G3WS52K6X
Thanks in advance to all the great GM TECH.S!!! I had a car towed in for overheating, I replaced upper rad. hose due to hole and added coolant and bleed system. I then let the veh idle for awhile then started to overheat-no fan cycle, if you turn on ac fans co...
1997 Pontiac Grand Am SE 3.1L instruments VIN: 1G2NE52M4V
Car runs fine but fuel guage, temp guage, tachometer,do not work .. the warning lites in the cluster remain on ..the charging syst is working fine . have scanned pcm no codes scan cluster or vtd. and pending and historical codes are switching yes to no continu...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Regal LS 3.8L steering wheel VIN: 2G4WB52K4W
Hi everyone,with your help I was able to remove the air bag. After reading your advice I used a cotter pin removing tool to get in there and pull back the wire clips. The problem was the Ign. switch. I had no voltage at the low blower fuse and when turning th...
1994 Chevrolet S10 2.2L Rev Limiter VIN: 1GCC1946R8
Thanks to everyone who replied. Went back and checked my connections at the ignition module and found no problems. Rechecked continuity between ecm and connector. In the end replaced ignition module and fixed the vehicle. Not sure why the module went bad but i...
1994 Chevrolet Cavalier RS 2.2L Poor Idle Quality VIN: 1G1JC5444R
Thank you to all who responded. We installed the wrong EGR gasket when assembling this engine. Vehicle runs great after replacement of correct gasket. Thanks again, Scott
1998 Chevrolet Venture 3.4L system inop. VIN: 1GNDX03E9W
hello, and thanks to Cornelio, James, Carl, and John. this venture van ended up having bad wireing between the pcm, and the ebtcm module. the 18 guage tan wire that transfers dataa between the two modules was chaffed. the harness runs between the left strut to...
2002 Chevrolet Monte Carlo LS 3.4L Hesitation, Misfire VIN: 2G1WW15E02
checked the back pressur on exahst and t was pluged one of the members said to look at rpm to stabilize fast after snap test and it took a minite to stabilize removed o2 sensor and car ran great replaced cat and car was fixed.
2003 Chevrolet Astro 4.3L Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GNDM19X63
thank you for the replies. we think this one was sticking valves due to a fluctuating vacuum gage needle when vehicle was missing. we ran GM top engine cleaner and changed the oil with an oil flush treatment. none of the symptoms have returned. Trouble codes: P0101 (maf circuit), P0300 (random misfire).
2004 GMC Sierra 2500 HD SLE 8.1L Misfire, MIL Lamp on VIN: 1GTHK29GX4
vehicacl was under warrentie went to dealer who replaced pcm thanks
2005 GMC Sierra 2500 HD SLE 6.6L chirping noise VIN: 1GTHK23225
first of all thanks for all the replies lots of good thoughts . the problem ended up being the exhaust coupler between the font convertor pipe and the rear muffler inlet pipe . it is coupler that fits over the pipe on both the inlet and outlet pipes has what i...
1966 Oldsmobile TORONADO 5.0L radio VIN: 6639687435
well guys thanks to all that replied seems like i had a couple of wires that where missing had to pretty much unwrap just about all the wiring in the dash to find them but it was well worth the work. now i can send this car out the door completely confident th...
1995 Oldsmobile Cutlass Supreme 3.1L No Start VIN: 1G3WH52M25
IT WAS THE FUEL INJECTOR FUSE IT WAS BLOWN WE REPLACED IT AND IT IS STILL RUNNING Trouble codes: 36 (cam sensor), 17 (crank sensor).
1986 Pontiac Firebird 2.8L fuel pump VIN: 1G2FS87S4G
Well, I was wrong about the relay location. I just glanced at the wires and saw some familiar colors. You all were correct it was on the left side closest to the engine. I verified it was good and that the ECM was commanding through it and it was. However, the...
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