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Prev Professional Automotive Repair Technical Discussions for December 19, 2011
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Open Help Requests for GM
Help Request Answers
1997 Chevrolet Express 2500 4.3L No Start, Stall VIN: 1GCFG25W9V
This is a good one! vehicle was driven in, but the customer states that it would dye when driving, when i got it, it would not start, except once so i drove it in the shop, it has spark, no codes, replace the fuel pump module, cut relay, fuel filter, cap & rot...
1998 Chevrolet Tracker 1.6L Misfire VIN: 2CNBJ1867W
Thank you in advance for any input on my problem child here. This 98 Tracker has a dead miss on #2 and idling a little high (1200). Started with basics, checked for spark, good. The spark is traveling at least an inch from cap. Checked fuel injector pulse, g...
1999 Chevrolet K1500 LS 5.7L oil pan VIN: 1GNFK16R6X
Replaced engine with reman unit for a rod knock. problem we're having is the oil pan will not seal where it crosses over on the timing cover. i've replaced the timing cover twice, tried a new oil pan, and multiple gaskets, and still leaks. I'm positive its not...
2003 Chevrolet Suburban 1500 5.3L cat & evap monitors
car came in with cel on, only code was P0300B - random cylinder misfire, no apparent misfire present, cleared code, performed routine service, l/o/f, attempted drive cycle to ready monitors and have now driven about 200 miles and 2 monitors still not ready (Ca...
2003 Chevrolet Silverado 1500 5.3L Misfire, MIL Lamp on VIN: 2GCEK19T33
this vech is an auction truck we replaced the fly wheel cracked. also replaced fuel filter and a kinked fuel line.both o2 sensors before the cats. fuel psi reg leaking. plugs wires and a coil pack. and fixed the gio3 ground for the pcm. when the computer goes ... Trouble codes: P0300, P0301
2004 Chevrolet Trailblazer LS 4.2L abs system and srs system VIN: 1GNDS13S34
Hello everyone, we have a tough one here. This 2004 chevy trailblazer is back again, the abs and airbag lights will come on and go off together intermittently. When i plug in our scanners(tech 2 and snap on solus)there are no codes stored and we can not turn t...
2005 Chevrolet Corvette 6.0L Blower motor VIN: 1G1YY34U25
The blower motor operates normally until you put it on high speed . Once you reach high speed the speed is not controllable with the control head( The blower runs at full speed no matter what speed you comand with the control head).With the Tech 2 I can comand...
2010 Chevrolet Silverado 2500 HD WT 6.0L airbag VIN: 1GC4KVBG2A
i have a problem with airbag batt fuse 45 in engine comp panel blowing after 2-3 days. Front seats have been pulled and wiring checked no prob found. This is a work truck and it does not have the airbag modules mounted under front seats. If anyone has any info...
1999 GMC Yukon Denali 5.7L abs activation @a non abs stop. VIN: 1GKEK13R5X
This truck actvates the abs @non abs stops ,but not every time.modis shows no sensor drop out @ any sensor.activation generally is @10 kms down to the default speed of 5 kms.originally i found the wiring of both wheel bearings tobe faulty,and replaced the sens...
2003 GMC Yukon Denali 6.0L radio VIN: 1GKEK63U93
Can somebody help me fix the radio on this 03 Yukon Denali? From what I can tell, it's a digital radio with cassette and CD. The lights turn on, the clock turns on when you push the display button, and it tries to eject a disc when you push the eject button. I...
2005 GMC Sierra 2500 HD SLE 6.6L heater VIN: 1GTHK29285
Customer originally brought in vehicle because coolant was bypassing the surge tank cap and draining onto the ground. No other issues. Installed new cap, replaced thermostats, and performed a coolant flush. Couple weeks later, customer reports that he has no h...
2000 Saturn SL2 1.9L Surge, Cuts out, Misfire, MIL Lamp on VIN: 1G8ZK5274Y
Vehicle came in with cel and misfire after vehicle warms up. Found several computer codes p0130 0134 0300 0326 0340 0341 0731 1133 1584 1599 1624. Cleared codes and drove vehicle first code to come back and only code was p0130. Unplugged o2 sensor 1 vehicle ru... Trouble codes: P0130 (O2 sensor), P0300 (Misfire)

Fixes & Summaries for GM
Fix/Summary Answers
2001 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K51
thanks for all the replies. it never got repaired because customer wanted vehicle back. the fuel pressure regulator was inspected, fuel pump pressure and waveform ok. fuel trim numbers where inline. it was a very intermittent concern. customer refused to leave...
1999 Chevrolet Tracker 2.0L Engine vibration VIN: 2CNBJ18C6X
Wrong vehicle/customer, thats why I had no repair history. The car I was thinking of was a Geo. This one is a dirty throttle plate slow IAC. Thanks to all those who offered help- I need all the help I can get some times
2002 Chevrolet Suburban 1500 LS 5.3L ABS module VIN: 3GNFK16Z32
Well this is finally fixed..she returned on Thursday..I went over everything I did as well as the other shop..all looked good, no bad hubs, sensors showed excellent readings..decided to recheck the ABS module and its ground..it looked good also, no bent pins e...
2005 Chevrolet Astro 4.3L Sdm VIN: 1GCDM19X15
thank you for all the help. I did get another used SDM and got communication back with all codes. I am setting up my pass through devise so I can try and reprogram it. Some say yes some say no. With the coast of a new on the company wanted to go this route fir...
2006 Chevrolet Trailblazer LT 4.2L No Start VIN: 1GNDT13S46
thanks to everyones input after tracing all circuits with no sign of a problem and still having battery + on coils and weak spark i gave the coils + from battery and that worked. replaced ign switch and veh started. it was not a voltage problem to the coils i...
1996 Geo Tracker 1.6L Hesitation VIN: 2CNBE1862T
Thanks for all the replies, final fix ended up being replacing the injecotors, didnt see much debris in screens, but after repl. ran like new..
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