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Prev Professional Automotive Repair Technical Discussions for March 11, 2013
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet S10 Blazer Tahoe 4.3L Electronic VIN: 1GNDT13W1R
Trans has plenty of power in reverse gear. Seems to only to have 3rd and 4th gear when selecting manualy. Starts off in 3rd all the time. We have done all the electical test in the flow charts and everything seems fine. As stated above we have replaced the TCC...
2004 Chevrolet Suburban 1500 LT 5.3L Engine VIN: 3GNFK16T94
Hi to All and thank you for your time reading, This Suburban came in to us for new CATS as emissions were nearly out of test. Both CATS replaced and now emissions are OK. Customer also asked us to look at the idle as from time to time it would occasionally '...
2005 Chevrolet Silverado 3500 6.6L Hesitation, MIL Lamp on VIN: 1GBJC33275
This Silverado wont go over 40km/hr Intermittantly. The mil is on.It does shift ok. Cleared codes and drives normal. Codes have repeated. Has anyone had a problem with these codes repeating lack of power thinking FICM hoping someone has repaired one similar an... Trouble codes: P0207, P0299, P2146
2006 Chevrolet Uplander LT 3.5L steering VIN: 1GNDX33L16
Replaced steering rack due to leak at rack. Otherwise everything was working normally. Installed reman rack and all was well for a few weeks. Vehicle was brought back because the steering wheel was hard to turn (no power assist) when going left (right turn was...
2000 GMC Savana 3500 5.7L MIL Lamp on VIN: 1GTHG35R2Y
I have lean codes for Bank 1 and Bank 2. Customer says the Van has died on him at times I have checked fuel pressure at filter pump is pushing 90 psi and also checked at regulator and the pressure was a little low at 47 replaced regulator and now pressure is 5... Trouble codes: P0171 (Fuel System Lean), P0174 (Fuel System Lean)

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Limited 3.8L Hvac VIN: 1G4HR52L4S
1994 Chevrolet Lumina Euro 3.1L 1-2 shift VIN: 2G1WN54T5R
decided to just drive it till it fails completely and replace the car
1994 Chevrolet Astro 4.3L No Start VIN: 1GBEL19W6R
Thanks to every one for the help. The main connection at the firewall had melted connections. I repaired those and also disconnected a nonworking remote starter. I also cleaned all the grounds at or near the battery. It starts like a champ now.
2000 Chevrolet Blazer LS 4.3L rear suspension or drivetrain VIN: 1GNDT13W3Y
I replaced the rear calipers, brackets, and pads 3 weeks ago. The noise has not come back. I waited to post the fix to make sure it was fixed. I still dont understand how racking the vehicle would make the noise stop for 4 to 5 days or the noise being most fre...
2002 Chevrolet Silverado 1500 LS 5.3L reverse
Thanks guys, you were right . The valve body bolts were mislocated. Easy fix when you know where to look.
2003 Chevrolet Silverado 1500 5.3L No Start VIN: 1GCEK13T13
First of all, Thanks to all that replied! The Voodoo Gods blessed me with communication to my instrument cluster after letting it sit all weekend with power removed from the vehicle. I have no idea still why communication returned after doing nothing. But a... Trouble codes: U1000.
2004 Chevrolet Venture LT 3.4L MIL Lamp on VIN: 1GNDX13E84
after countless attemps to fix this finaally acted up on a road test, found that it was running out of fuel, fuel trims went to + 23 on acceleration. Trouble codes: P0171.
2004 Chevrolet Classic LS 2.2L No Start VIN: 1G1ND52F14
Fixed it. The consensus of replies said to concentrate on the anti-theft/passlock/sensor area and you kind folks were correct. Customer opted to bypass the system so we installed a resistor between circuits 1835 & 1836 and did the 10 minute relearn of the new ... Trouble codes: B2960 (Security system cylinder data incorrect).
2004 Chevrolet Silverado 2500 HD 6.6L Instrument cluste VIN: 1GCHK23294
Thanks everybody for the input. Another new alternator fixed it. The brown wire at the plug should have 12 volts koeo while unplugged. Plugged in with koeo should have close to 0 volts. The 0 volts is the grounding of the "charge indicator control" to the pcm...
2007 Chevrolet Suburban 1500 LTZ 5.3L Poor Idle Quality, High Idle VIN: 1GNFK16397
Sorry I did not get back to everyone ASAP. On firday we tried all the things listed with no changes to the .65 & .67 readings in the Throttle relearn. I drove it the the dealier, went over it with the Guy and the Tech2. Relearned,No changes. So we falshed th... Trouble codes: P0121 (Throttle switch ckt. performance), P0573 (Cruise brake switch a ckt high).
2006 GMC Envoy SLT 4.2L MIL Lamp on, Hard starting VIN: 1GKDT13S06
Finally confident that we have a fix. Sine it was very intermittant, when it finnally returned replaced pcm and cust says today 2 full weeks later, that isue has not returned. Thanks to all for your help. Trouble codes: P0601.
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