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Prev Professional Automotive Repair Technical Discussions for June 6, 2013
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Open Help Requests for GM
Help Request Answers
2004 Buick Rainier CXL 4.2L Transfer Case VIN: 5GADT13S74
This vehicle came to us after the dealer threw their hands up on it. Problem is the transfer case will slowly go into AWD and stay there. The dealership replace the encoder motor sensor and reset the transfer case first. That lasted about 2 weeks, then it was ...
1999 Chevrolet Express 3500 5.7L No Start
I've got this 99 Express van that won't start and I can't figure out why. About 3 years ago I replaced the PCM(with a GM part)for multiple DTC's and running rough.The PCM was filled with power steering fluid from a leaking hydrobooster.Anyway I've checked fuel...
2000 Chevrolet C2500 5.7L No Start VIN: 1GCGC24R1Y
Thanks for taking a bit for my first post, i got a truck in for a no start and the guy had already been working on it. Towed in and already partially disassembled i checked fuel pressure manually and saw spark response out of a timing light but the pcm is comm...
2001 Chevrolet Silverado 2500 HD 8.1L Poor Fuel Economy VIN: 1GCHK23G31
i have a problem with this 8.1. now i know its not known for its fuel efficiency but the customer swears that it was getting between 11 or 12 mpg. now it is getting 5 to 6 mpg.i have drove this truck and scanned for everything, iam not seeing any problem.ive c...
2007 Chevrolet Avalanche LTZ 5.3L Poor Idle Quality VIN: 3GNEC12007
I need help with this avalanche.Acc.pedal sensor and new throttle body eo wre replaced to fix code p0121 throttle pedal position sensor ckt.I did the throttle relearned by I have a problem if the vehicle is in park or neutral and I snap the throttl... Trouble codes: P0121
2008 Chevrolet Equinox LTZ 3.4L Abs VIN: 2CNDL33F68
rear brakes appear to be locking up checked calipers, sliding pins, lines, brake fluid all seems OK not sure if the propotional modulator valve is the cause some info from service manual suggests replacement not sure how to proceed
1999 Oldsmobile Bravada 4.3L fuel injection VIN: 1GHDT13W7X
Hello IATN family. customer came to me and stated that after a two hour time period his truck would not start properly, it just cranked and cranked and finally would catch. we checked for spark, good, tested for fuel pressure, had 55 pounds and holding. so we ...
2007 Saturn Aura XR 3.6L shifting VIN: 1G8ZV57747
vehicle came into the shop w/ the complaint of being sluggish. Scanned vehicle and revealed code po777 current. Test drove car to find that is acting as if it is in limp mode or stuck in 2nd gear. I'm finding out that there is not a trans available for the car...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Century Custom 3.1L Hesitation, Surge VIN: 2G4WS52J02
Okay,this one is fixed and on it's way back to Kansas. Thanks for all the good info;it was a bad coil.The thing was that threw me was the lack of any misfire codes. I DO need a better scanner!
2003 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52K23
Thank you for all the replies. Apparently cleaning the ground by under the coil pack did the trick. I drove it nearly 15 miles country and city and the car ran like a charm. Why it was losing communication I'll never know. Btw, I'm not retiring, just getting ...
2007 GMC Sierra 1500 SLT 6.0L No Start VIN: 2GTFK13Y87
Thanks for all the help. Dead BCM. We work on lots of GM vehicles and have had a bunch of dead batteries after being on the rack but this is the first that had the BCM fail as a result. Gonna be a little more careful in the future. Again, thanks to the IATN so... Trouble codes: U0140 (Lost communication with the BCM).
2002 Pontiac Montana 3.4L Cuts out, Stall VIN: 1GMDX03E72
Hi guys. Thank you all first off for the replies and for taking time to read this. The fix was a new AC delco TPS. I totally forgot about the other crank sensor on the side of the block between the engine and trans! Been awhile since I've worked on one of t...
2006 Saturn Vue 3.5L Electronic VIN: 5GZCZ53416
Hello to all sorry it took so long to closed this post broke bone in foot so have been out for awile. Well groung was the problem the forth gear switch was bad. Only thing I can think of is when I unpluged the sensor it pulled the term apart from inside the se...
2008 Saturn Astra XE 1.8L No Start VIN: W08AR67118
Ok, here's my story. Spent all day attempting to access any of the vehicle systems with [...] wouldn't work...I now know that is not true and the problem is in the Tech2W...
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