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Prev Professional Automotive Repair Technical Discussions for March 1, 2006
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Open Help Requests for GM
Help Request Answers
1991 Buick Century Custom 3.3L Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 3G4AH5YN1M
hi guys i need some help costumer complane when car goes over 55mph it buckes tem light flashes and check engine light on steady then begins to flash and stalls out i pull the car in and chck for codes found 27 secound gear switch or circuit prob,26 quad drive... Trouble codes: 27 (2nd gear switch or circuit problem), 26 (quad driver module failure), 21 (throttle position sensor/circuit high), 43 (esc module for sensor circuit problem), 48 (misfire/fuel/ignition problem), 14 (coolant tem signal low or shorted)
2002 Buick Century Custom 3.1L cruise control VIN: 2G4WS52J92
Hey techs, Customer states cruise control quit working when he stop briefly on the highway. Then he hit resume, the c/c never came back on. We hooked up snap on scanner and received a P1554 code. (The PCM detects a cruise control engaged signal from the cruis...
1998 Cadillac Catera 3.0L speedometer VIN: W06VR52R2W
Hi everybody : Somebody installed a aftermarket (SONY) stereo and the speedometer stop working after a week driving,it also set a pcm code "vss signal out of range",but if you disconnect the radio and reconnected again,the speedometer will start working again...
1992 Chevrolet S10 Blazer 4.3L module VIN: 1GKDT13WGN
this lady lives two miles down a dirt road twenty miles from town. she comes to town every day. she always puts it in 4wd to drive on the dirt (even on the 4th of july) and two on the paved. about every 2 months the module goes bad...won't even blink the light...
1993 Chevrolet C2500 Cheyenne 5.0L master cylender VIN: 1GCFC24H2P
I have never had a problem bleeding brakes untill know. The truck came in with little or not brake pedel. Replaced master cyl. and bleed system. It know stopes but not as good as it should. After reading the fixes in the arcives. I replaced the dump valve. No ...
1997 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19R0V
This vehicle will misfire at idle and inproves off idle. I would suspect broken intake gasket but the plug shows no sign of oil fouling. Can this spider injection system cause a single cyliner misfire? Can there be a vac leak where it will not suck oil from li... Trouble codes: P0161, P0507 (Idle system hi Idle), P0306 (Cylinder 6 misfire detected)
1997 Chevrolet C1500 Cheyenne 5.0L timing chain VIN: 2GCEC19M2V
Customer has installed timing chain out by about 7 teeth and yeah it would not start. Anyhow I have this thing apart and was wondering if this engine is interference fit. Can it bend valves? The engine seems very hard to turn over by hand(pipe wrench on crank ...
1997 Chevrolet S10 2.2L Excessive Emissions, Misfire, MIL Lamp on, No Power VIN: 1GCCS1440V
This post is for my satisfaction don,t think they have money to fix problem. Truck has no power.Max rpm is 2500.Checked converter first then unhooked pipe at manifold exhaust ok.All cylinders misfire about the same. Vacuum low map running engine rich can,t fin... Trouble codes: P0300, P0107
1998 Chevrolet Lumina 3.1L Theft Deterrent VIN: 2G1WL5ZM1W
Thanks ahead of time for any possible help on this. I have a 98' Chevy Lumina, 3.1L that when you turn the key nothing happens as far as starter operation. I feel the problem lies in the theft deterrent module. I checked resistance of both ignition keys custom...
1999 Chevrolet Cavalier 2.2L valves VIN: 1G1JC5246X
hello, car came in for rough running,took compression ck,two cyls.no compression.removed head , 2 bent valves,removed timing cover ,ck chain,ok,head done over,replaced lifters,drove around for a day,ran great,customer took car,4 days later.car back in for roug...
1999 Chevrolet Silverado 1500 4.3L Stall VIN: 1GCEC14W1X
Truck dies intermittently for owner, has never failed for us. Has never set any codes. Have checked all the basics and they appear fine. Replaced ignition switch first because it was also having starting problems. Starting problems are gone but not the stallin...
2000 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEC14W7Y
This vehicle initially came in with the classic gm truck no start condition. Upon locating an inop fuel pump we also noticed a sticky substance around the filler neck. It appears that this customer was the recipient of some vandalism. After removing the tank w...
2000 Chevrolet Suburban 1500 LT 5.3L dash lights VIN: 3GNFK16T0Y
Vehicle was at another shop for replacement of the four wheel drive switch. After new switch was installed the dash lights no longer worked. Shop A put a new switch in the truck with no change. We first discovered that we had no power at the illumination fuse....
2002 Chevrolet Suburban 1500 LT 5.3L 1-2 shift VIN: 1GNFK16Z72
we have a 4l60 trans with a 1-2 hard upshift(bangs). that is the only time you feel the bang shift is doing the 1 -2 upshift - you do not feel it in any other gear or on downshift. we serviced trans and installed new pan gasket and filter. there was no metal i...
1997 GMC Jimmy SL 4.3L transfer case VIN: 1GKDT13W4V
Need help guys with this one. this is a 233 electronic transfer case. Truck bought at used car dealer auction by local dealer another shop had installed a remanufactured transfer case shift motor but transfer case still would not shift. Dealer brought vehicle ...
1998 GMC Jimmy Envoy 4.3L Heater System VIN: 1GKDT13W3W
For sone time now, this vehicle has been producing insufficient heat - Have replaced heater core and heat/defrost door in heater box, multiple thermostats - last one was OE, and water pump due to leaking (New - not reman). Still does not produce good heat and ...
1998 GMC W3500 2.4L No 3-4 VIN: J8DB4B14XX
Howdy folks, maybe someone else has run into this issue. I have a 4/98 W3500 series Tiltmaster truck with the turbo diesel motor and an Aisin Sieke (450-43LE)trans. It's problem is no 4th gear when you drive it. I can put the truck in the air drive it up to 3r...
2003 GMC Savana 1500 5.3L cluster VIN: 1GDFH15T93
This vehicle has already been to a dealer and the ignition switch was replaced. Customer drove vehicle on weekend and after a couple hours of driving everything was lost again. Any ideas?
2001 Oldsmobile Intrigue GX 3.5L Misfire, MIL Lamp on VIN: 1G3WH52H21
Brought the car in the next day. Start up was good car ran for about 30 sec. then began to miss very bad for about 1 min. Then went away. I let it cool for 1 hr and it was back. Has any one had this problem. Thanks Trouble codes: P0300
1994 Pontiac Trans Sport 3.8L No Start VIN: 1GMDU06L9R
this vehicle was towed in with no start. started diagnosis with fuel pressure test within range checked ignition no spark. as suspected no injection pulse either. scanned vehicle for codes or out of normal data. noticed no rpms during cranking. i also checked ...
1996 Pontiac Grand Am SE 2.4L Misfire, MIL Lamp on VIN: 1G2NE12TOT
Hi Techs, I'm looking for some help with this Quad 4 engine. The coil housing failed last year. I replaced it with an after market housing and within two months that one failed. I replaced it under warrarty with another after market one. Three months later th...
1996 Pontiac Sunfire GT 2.4L Excessive Emissions, Poor Fuel Economy VIN: 1G2JD12T4T
Hey Guys! We have this Sunfire in the shop with a complaint of poor fuel economy. Now I know that that issue can be a matter of opinion, but we definately found something wrong on this car. The Long-term fuel trim is right around -17% most of the time. At idl...
1997 Pontiac Grand Prix SE 3.8L MIL Lamp on VIN: 1G2WJ52K6V
I have this car in here with a p0171 code, running lean condition. I have replaved the upper intake along with the lower intake gaskets, I have replaced the injector o-rings, maf sensor, map sensor, and 02 sensor. I still get the code to come back and sometime...
2000 Pontiac Bonneville SE 3.8L power windows and door locks VIN: 1G2HX54K5Y
2001 Pontiac Grand Am SE 3.4L MIL Lamp on VIN: 1G2NF52E61
hey guys need help i have this pont. that the ses lite comes on on accel. shut car off and restart no lite as soon as you start moving 100 feet lite pops on with no codes.checked fuses and grounds all ok.do i have a bad computor? thanks for any help.bill

Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet Astro CL 4.3L Poor Idle Quality, Misfire VIN: 1GNDM19W8R
Sorry guys customer is very happy with the van says is running good and doesn't want me to play with it for the idle promblem. She is happy the way it is,It's me that wasn't happy with it. So thanks for all the replies, and your time.
1996 Chevrolet Lumina 3.1L radiator VIN: 2G1WL52MXT
Thanks to all who replied with ideas about my dilema. As suggested by nearly everyone, we ended up with a head gasket problem. Thnaks again to all who helped.
2002 Chevrolet Impala 3.4L Brakes VIN: 2G1WF52EO2
Thanks to all who replied, The fix on this one was to follow the bulletin for the rotors. Did what the bulletin said and everything is ok now.
2004 Chevrolet Malibu LS 3.5L Electronic power steering VIN: 1G1ZT528X4
This is a first for me. Turns out couple of tight ball joints was causing the unit to overheat, and go into some kind of thermal shutdown mode. Strange, but apparently this is a problem with these cars. Vehicle is fixed, special thanks to all that offered help...
1989 GMC V1500 Suburban 5.7L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1GKEV16K9K
Ok here we go! We received a lot of responses, thanks, but this one is still not fixed. We removed the throttle body visually inspected the base and gasket, checked the vacuum ports for blockage - no problems, we checked ignition timing (0 degrees base timing)... Trouble codes: 44 (Lean exhaust).
2004 GMC Sierra 2500 6.0L temp. control VIN: 1GTGC23U34
Thanks to Mike and John for replying on this one. A new actuator motor fixed the problem.These actuators contain a logic module and potentiometer to inform the HVAC module of their position it seems that it was not indicating a proper reading to the HVAC modul...
1993 Pontiac Bonneville SE 3.8L Surge, Stall, warning chime VIN: 1G2HX53L8P
cleaned battery terminals and cable ends problem solved Thanks to everyone that replied to our request
1996 Pontiac Grand Am SE 3.1L Surge, Misfire VIN: 1G2NMW12M7
Thanks to all who replied. It was a combination of 2 problems. The cam signal was not stable and the fuel regulator was bad. Trouble codes: P0300 (missfire bad surge).
1997 Pontiac Grand Am SE 2.4L Drive Axle VIN: 1G2NE12T1V
Once again, I would like to thank all those who replied. Thank you for sharing. I talked to the customer. The mechanic returned. He told the customer that there was damage to the collar. According to him, this is as a result of the CV axle being in the car too...
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