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Prev Professional Automotive Repair Technical Discussions for June 4, 2013
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Open Help Requests for GM
Help Request Answers
2006 Buick Lucerne CX 3.8L Hesitation VIN: 1G4HP57266
Hey all, been working on this car off and on for the last 6 months, it intermittenly will stumble on take off and set the p0107 and p1107 codes when it does. We had replaced the MAP sensor orginally after not being able to duplicate the issue. It went for 2 mo... Trouble codes: P0107 (Map sensor low voltage), P1107 (Map sensor int. Low voltage)
2006 Cadillac CTS 3.6L Poor Idle Quality, Hesitation, Misfire VIN: 1G6DP57736
this car runs and idles perfect until you reach 1500 rpm then it hesitates and runs bad seems like a misfire but have tried new coils . if you rev engine to 2700rpm then let idle it all goes away and runs perfect. Until you hit 1500rpm again. at highway speeds... Trouble codes: 0300 (0302 -), 0302 (0303 -), 0303 (0304 -), 0304 (0306 -), 0306
1995 Chevrolet S10 LS 2.2L Poor Idle Quality, MIL Lamp on VIN: 1GCCS1947S
Initially vehicle came in with a very rough idle and a rich code. Found the fuel pressure regulator was leaking out the vacuum port. Installed a new regulator and it operated backwards (pressure went up at idle and down when the throttle was opened). So instal... Trouble codes: 45 (Rich Exhaust)
1999 Chevrolet Express 1500 5.7L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GBFG15R6X
I had a customer come in with his Van for the MIL light being on. We check the codes and came up with p0135,p0154,p0155,p0161,p0303,p0327 and p1153. The van drives well no misfire but uses a little more fuel then its supposed to. Fuel pressure is where it's su... Trouble codes: P0135, P0154, P0155, P0161, P0303, P0327
2001 Chevrolet Silverado 1500 5.3L Misfire VIN: 1GCEK14T71
I have got this 2001 chevy 5.3 that came in with the owner saying it has a tranny problem. on easy,1/3 throttle accel it runs and shifts fine,powerbrakes etc. but when you start accelerating aggressively it winds out with not much pick-up or speed and will not... Trouble codes: P131, P151, P300, P463, B1001
2007 GMC Envoy SLE 4.2L Stall VIN: 1GKDT13S77
wont idle hot acts like cam timing off sets code for cam crank corolation and low vacuum runs fine over 800 rpm replaced phaser with new gm part can activate it wile holding idle up and watch it work if i can get it to idle it sounds like it has a big camshaft... Trouble codes: P0017
2002 Oldsmobile Bravada 4.2L Misfire, MIL Lamp on VIN: 1GHDT13S32
Just have a question about what I am seeing with freeze frame data on this vehicle. I can never get it to misfire no matter what I do. Vacuum needle never fickers, very good power, cat not plugged. New plugs. When code sets, misfire data records nearly equal n... Trouble codes: P0300 (Random/multiple misfire)
1991 Pontiac Trans Sport 3.1L no spark VIN: 1GMCU06DXM
Hi All, This old van is mine. Great old dog hauler until recently started to stumble and lose power then, while trying to figure it out it just stopped starting up. NOTE: This is a TBI with NO crank sensor. At first I thought I had a fuel problem. I did. Bot...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Park Avenue Ultra 3.8L MIL Lamp on VIN: 1G4CU5419Y
Im going to call this a fix. Kudos to all that suggested a blockage in the intake. it felt like fantactic flow but I aggessively used carb cleaner with the motor running. Flow still felt the same and long terms stayed the same but now the mode 6 number goes ba... Trouble codes: P0401.
2000 Chevrolet S10 4.3L No Start VIN: 1GCDT19W9Y
everyone thought lock cyl,i had previously tried that.the varying voltage has to be caused by resistance in one of the connectors,havent got the truck away from customer yet to check them. If I cant find a loose, corroded connector I will give them a drop of c... Trouble codes: B2960.
2007 GMC Yukon XL 2500 SLT 6.0L Cluster display VIN: 1GKGK26K27
Thanks for the help guys, It turns out that the VDO Redi-sensor did not work on this vehicle. Changed it out for a GM sensor and the reports for the DIC went normal. See Ya next year Kings! Go Blackhawks
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