× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 30, 2004
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
1993 Buick Regal Custom 3.8L Poor Idle Quality, Surge VIN: 2G4WB54L2P
This Buick will intermittantly idle poorly. It has a "rolling" idle or it may be described as a surge at idle. Sometimes it will do it just as the car is started, or it may not occur for 50 miles of driving. We have been chasing it for almost a year on and off...
1995 Chevrolet Corsica 3.1L heater VIN: 1G1LD55M65
heater is not getting hot enough (91 degrees at vent); after repair it worked ok (149 degrees)until a test drive then went back to not working. one of the hoses coming out of the heater core is not as hot as the other, but the flow appears to be good
2000 Chevrolet K3500 7.4L MIL Lamp on VIN: 1GCHK34J6Y
This truck came in with a p0172 and p0175 and also a hard start on a hot soak of about 10 to 20 min. fuel pressure was dropping of slowly. Checked injectors and found four dripping. Replaced all 8 inj with new bosch inj from linder tech also replaced rhe fuel ... Trouble codes: P0172 (Fuel trim system rich bank 1), P0175 (Fuel trim system rich bank 2)
2000 Chevrolet Tahoe 5.7L injector pulse VIN: 1GNEK13R9Y
Hello GM Techs, Tahoe came in yesterday with a hard start in morning. Scanned computer: Code P1626 Theft Deterrent Fuel Enable Signal not Received. When it cranks and no start- injector pulse is at 0. Car will start and run for about 1 second. 10-12 tries it w...
2002 Chevrolet Trailblazer LS 4.2L codes P1633, B1440 VIN: 1GMDT13S42
Hi everyone. This TrailBlazer came in with service soon light, 4x4 light, and ABS light on. The VCM, ATC, BCM, and IPC all had a pile of 'loss of voltage' and communication codes. We replaced the ignition switch which fixed most of it. Were now left with P1633... Trouble codes: P1633, B1440 (Ign 0 voltage loss to BCM)
2002 Chevrolet Tahoe LS 5.3L MIL Lamp on VIN: 1GNEC13Z32
Hi I have this Tahoe in with a check engine light on with a cam sensor error code. I Replaced the sensor because my only diag. tool is my scanner and Alldata and Alldata has very limited info on checking this code. The car does have an extended crank times som... Trouble codes: P0431
1992 GMC G3500 Rally 5.7L No Start VIN: 2GTGG35K1N
Will not start cold found loss of injector pulse cold small amounbt of fuel poured into manifold will start. I have three vans of same year and same configuration with same problem. I am lokking to see if there has been a comon problem I have not heard of. All...
1996 GMC Topkick 366CID actuator VIN: 1GDJ7H1P4T
I work on cars primarily but I have a small fleet with 2 of these Topkicks.The problem is the park brake won;t release in below freezing weather.The fluid is getting moisture in it,changing the fluid cures the problem for a while. Does anyone know of a long te...
1992 Oldsmobile 88 Royale 3.8L cooling fans VIN: 1G3HY5316N
Fellow techs, Check engine light is on. Retrieved code 15 (coolant temp. sensor low input or circuit problem). Both cooling fans are inop. I unlugged the temp sensor at rear of block and the gauge on instrument cluster stopped registering, so I plugged it ba...
1998 Oldsmobile Bravada 4.3L blend air door VIN: 1GHDT13W2W
vehicle came in with a new controller and actuator installed the temp door will not move from hot to cold position i do not have a tech2 so i have no dtcs or datastream the act. has a 5v ref the mator portion of it has bat+ i can ground the controlside and for...
1997 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX52K5V
this car floods the spark plugs we pulled the plugs they were soaked with fuel.the inj.pulse m/s is 75.0 we got a used ecm tryed that it didn't help. thanks chuck
1997 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE52T0V
DO NOT RESPOND TO THIS The vehicle was brought in 5 or 6 times in the spring for a no start situation. Everytime it would fire right up as soon as it was off the hook. Never missed a beat and started everytime at the shop. We tried cleaning the grounds, chang...
2000 Pontiac Grand Am SE 2.4L Excessive Emissions, Poor Idle Quality, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G2NF52T6Y
this has had the light go on and off for 2 years according to the owner, brought it out for smell out air ducts and to check light, it had a po303 # 3 miss fire- i changed plugs and checked ohms hot on the coils, looked for markes on coils and housing, checked... Trouble codes: P0303, P0300

Fixes & Summaries for GM
Fix/Summary Answers
1992 Chevrolet K2500 Cheyenne 6.5L engine VIN: 1GCGK24FSN
Thanks again for all of the replys. Most dealt with the fact that it had to have basic mechanical problems. The customer picked up the vehicle unrepaired. As of yet no answers to what happened or why. I ran out of time so I have to close this post. I contacted...
1994 Chevrolet Cavalier RS 2.2L No Start VIN: 1G1JC1448R
Thank's to all who repied. The fix was the timing chain tensioner was shot and the timing jumped. Replaced Timing chain, gears and tensioner and the vehicle started. It did smoke alot but let it run until smoke was gone and then replaced spark plugs. All is we...
1997 Chevrolet Venture LS 3.4L Poor Fuel Economy VIN: 1GNDX03E0V
I don't know if we will get the opportunity to try all your suggestions as that decision rests with the customer. Being the holiday season it may not come back in until the new year. If we do get it back in I will post the results of testing. I did however r...
1997 Chevrolet Malibu 3.1L Misfire, MIL Lamp on VIN: 1G1ND52M8V
Thanks to Steve, Roger, Deke, Javier, Charles, Rudy & 2 unsigned Tech's for responding. After rechecking the plugs & wires to make sure they were all good, and confering with the owner, I did another Injector Flush. This seamed to take care of the problem. How... Trouble codes: P0300 (Random misfire).
1998 Chevrolet Express 1500 5.7L MIL Lamp on VIN: 1GBFG15R6W
Thanks for your replys PO 121 has not re occured since 2nd new PCM was replaced.We were not able to get Cat.Monitors to run.Finally got bank 1 monitor to set,however bank 2 converter showed poor efficency.We had previously replaced both converters.Converters w... Trouble codes: P0121.
2000 Chevrolet Silverado 1500 4.8L Poor Idle Quality, Misfire VIN: 2GCEC19V7Y
Well, most of you were right. It was the intake manifold gaskets. It was the one peice manifold so the job went really easy. Thanks to everyone. This system rules!!! Trouble codes: P0300.
2000 Chevrolet S10 2.2L Surge, Misfire, MIL Lamp on VIN: 1GCCS1452Y
Net Techs, First I want to thank all those that offered help on this. I don't know if this fix will help any one or not but here goes. As I mentioned in the original post, only the p0300 would reappear. When I monitored the misfires only #1 was counting up. ... Trouble codes: P0300 (Random miss), P0301, P0201 (inj 1 circuit), P0201 (inj 1 circuit).
2002 Chevrolet Monte Carlo SS 3.8L Door Locks VIN: 2G1WX15K22
sorry for the delay on a post. the costomer has not brought the car back yet. all your replies were great and i thank you for your help.
1998 GMC Safari SLE 4.3L Poor Fuel Economy VIN: 1GKEL19W4W
Nine replies overnite: Wow and thanks. Most replies suggest spark plug access thru the wheel wells, a couple suggest accessing rear plugs from the doghouse. Yes, we did use a large assortment of sockets, extensions & wrenches to access all. Additional thanks t...
2000 Pontiac Montana 3.4L wobble VIN: 1GMDX03E5Y
Most of the responses thought it would be bad motor mounts or cv axles. All the mounts we're fine,so we put both axle shafts in and that took care of the problem. thanks
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next