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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 12, 2008
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Open Help Requests for GM
Help Request Answers
2001 Cadillac DeVille 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G5KD54Y11
Hello Everyone, I have this cadillac deville with a 4.6 and it came in with a check engine light on. I did some testing and came to determine the crank sensors were faulty. replaced them and still have the same problem. About a week a go i replaced the spark ... Trouble codes: P0171, P0164, P0335, P0300
1989 Chevrolet S10 Blazer Sport 4.3L gage no disply VIN: 1GNCT18Z3K
This one is really strange, I sent the cluster back to model for repair, it came back tested good! i rechecked power and ground and all inputs at connector, removed connector and checked the connectors and even ran a welding tip file in them. no sign of a loos...
1994 Chevrolet S10 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1GCCT14WXR
please help iatn, customer brought this vehicle in with misfires on cylinders 2,4, and 6; it idled very poorly and ran very rich. knowing that these are prone to leak we pulled upper plenum and found fuel pressure regulator leaking, but no leaks in lines. repl...
2000 Chevrolet Monte Carlo SS 3.8L Stall VIN: 2G1WX12K6Y
Good afternoon to all and thanks in advance for all your help.I have this 2000 Monte Carlo SS that we just sold last wednesday.Customer has complained of a intemitant stall.It has only staled 4-5 times with "no ryme or reason" as to when it stalls.Customer sta...
2001 Chevrolet Cavalier LS 2.4L a/c compressor performance VIN: 1G1JF52T91
Do not see any signs of a restriction or any icing on lines or condenser. on road test cooling performance ok until vehicle slows down and then the pressures rise and the high press. cut out cuts off comp. seems like a restriction but can not pin point source....
2004 Chevrolet Malibu LT 3.5L panic mode trunk opens VIN: 1G1ZU54874
the alarm will go off on i'ts own. when we hear the alarm the lites are flashing and the trunk is open, could happen any time. the most inconvient is 3:am sitting in the drive way! i went past a car doing the same thing in a prking lot same vintage, has any bo...
1995 GMC Jimmy SL 4.3L No Start VIN: 1GKDT13W8S
customer came in with code 1351 est output high. customer had truck at other shop trying to fix problem after getting it back after two weeks . shop had a obd11 scan tool that was given to customer, if truck would not start just clear codes and truck will run ... Trouble codes: 1351 (est output high or pulses detected when open)
2003 GMC Sierra 1500 SLE 5.3L gear box VIN: 1GTEK19T93
A vibration, gowning noise coming from steering wheel. Happens when steering while is being turned slowly to the left, nothing happen going to the right. also noticed hammering coming out of the return line from the gear box, hammers enough to cause the cooler...
1996 Oldsmobile Achieva SL 3.1L No Start, Stall VIN: 1G3NL52M1T
This car starts and imediatly stalls. Has codes 1573 and 1629 that are reocurring. Car will eventually start if repeatedly attempted. Ohmed ciruit 800 "UART serial data line". Circuit OK. dont really know what direction to go in... Some experience in these old... Trouble codes: P1573, P1629
1988 Pontiac Grand Prix SE 2.8L Misfire VIN: 1G2WP14W2J
vehicle came in running rough, found cylinders 1 and 4 to have no spark, replace the coil still nothing replaced the module and still same result, looked at the live data and noticed that the rpm was out of control on the data, it was jumping around from 2000 ...

Fixes & Summaries for GM
Fix/Summary Answers
2007 Cadillac Escalade EXT 6.2L Tire Pressure Monitor
Thanks to Lucas, Tom and Alex fot their replies. The bottom line on this one is you have to have the TIPS activation tool. A Tech 11 by itself will not do the job. I tried the letting air out of the tire procedure while the TPMS system is resetting itself and...
1993 Chevrolet S10 Blazer 4.3L No Start VIN: 1GNDT143W3
All 15 replies gave good sound ideas and info. This Blazer really are my lunch. When first checked, had poor intermittant injector pulse. Replaced ign module, pickup coil as both had corroaded-green connections. Also replaced dist. shaft for cracked magnets. N...
1997 Chevrolet C1500 5.0L Steering VIN: 1GCEC19MOV
thanks again to all who replied it was in fact the steering wheel position sensor
1997 Chevrolet C1500 5.0L steering box VIN: 1GCEC19MOV
sorry guys i had two postings on this vehicle one was an update i cleared the first but not the second so i will do it now and thanks again to all it was the sterring wheel sensor
1999 Chevrolet K2500 5.7L No Start, MIL Lamp on VIN: 1GCGK29R3X
Ok thanks for all the help. After I learned that the Fuel Pump was operating normally. I start back to the spark problem. I Scoped the driver wire at the ICM and the icm signal wire at the coil. The wire at coil would drop out. The a new Connector for the ic... Trouble codes: P0338 (ckp Sensor Circuit High Duty Cycle), P1361 (Ignition coil control circuit low Voltage).
2001 Chevrolet Silverado 2500 HD 6.6L Low power VIN: 1GCHK23191
When We removed the injector lines the rust from the lines had fallen into the injectors, we had cleaned them out but they were still plugged it took a set of injectors to fix this truck. runs great
2001 Chevrolet Silverado 1500 5.3L Safety VIN: 2GCEC19T41
With the excellent suggestion from Dean [...] we have solved this problem. Dean suggested that the two ground wires attached to the frame just under the drivers door may be my problem. We removed the ground wires, buffed the frame with a grinder, sanded the...
2001 Chevrolet S10 2.2L cooling VIN: 1GCCS14591
2001 Chevrolet Impala 3.4L MIL Lamp on VIN: 2G1WF55E71
Thanks for all the help. It turned out to be a bad cable on the scanner. Buddy said that you can ground pin 4 on the aldl and scope pin 4. That worked great for not having another scanner. Later in the day we had to run to a friends shop so we checked the ...
1996 GMC C3500 HD 6.5L Excessive Emissions, Poor Fuel Economy, MIL Lamp on, no power,black smoke VIN: 1GDKC43E8T
None of the replies addressed the lack of ground in the pcm for the waistgate solenoid. I made it clear the wires were good at the solenoid & to the pcm. My problem is a lack of ground in the pcm & techs told me to replace the injectors & injection pump. Since... Trouble codes: P0236.
1997 Pontiac Grand Prix GTP 3.8L Misfire VIN: 1G2WP5211V
I found the fix for this car right away in the mourning, I decided to pull the fuel rail and switch the injectors. I found a chunk of electrical tape blocking half of the injector hole. Now the car runs great. thank you for the help
1999 Pontiac Montana 3.4L sir
Fixed the beast. I got 4 excellent replies that were all basically correct and here's a quick summary. Arthur [...] filled me in on the fact the system is indeed disabled when this problem exists which was a factor in getting the customer to pursue and repair...
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