Last post on Apr 30, 2012 at 8:10 PM
You are in the Buick Rainier
What is this discussion about?
Chevrolet TrailBlazer, GMC Envoy, Buick Rainier, GMC Envoy XL, Isuzu Ascender, Oldsmobile Bravada, SUV
#13699 of 18329 RE: Sticking wipers! by lurker01
Jan 08, 2004 (10:57 am)
Here's the Bloomberg news story I have saved from last September. Can't find an actual bulletin on this. Maybe someone with better access can. But this will help document that wiper failure is a known, ongoing problem.
WEDNESDAY September 24, 2003
Windshield-wiper woe may force GM recall
General Motors Corp. faces a U.S. investigation that may result in the recall of 662,000 of its 2002 and 2003 GMC Envoy,Oldsmobile Bravada and Chevrolet TrailBlazer SUVs for a windshield-wiper problem.
The National Highway Traffic Safety Administration said Tuesday on its Web site that it has received 18 complaints that the wipers fail while driving, don't turn on when needed or can't be turned off. No crashes or injuries have been reported, the agency said.
Jan 08, 2004 (11:26 am)
That's what WE are here, too! A few people on the internet, relating our experiences
Exactly. I don't expect everyone to agree with me or believe everything I say, that's why I prefer dealing with hard, concrete facts.
I still have a problem with people saying "the PCM learned around the chip" and stuff like that, because that sounds like it came from someone who doesn't know a thing about how software works.
I suppose we can agree to disagree for now.
Jan 08, 2004 (11:59 am)
"I still have a problem with people saying "the PCM learned around the chip... sounds like it came from someone who doesn't know a thing about how software works."
Yes I agree, it does leave some doubts, but my conclusion after reading the description of operation in the service manual, and the reaction over time some people have reported, that IS probably how the software works. It corrects for sensor readings within a certain allowed range that don't match with the baseline programmed parameters like trans pressures, shift adapts and fuel trim and stores those changes. One thing it notes is when the system looses power long enough, the vehicle may not drive or behave like the customer expects until those adapts and trims are re-learned by driving. I suppose if you could trick the PCM to read the sensor signals are within normal range it would not re-learn around the add-on module.
Seems to me, the best effective way to alter the tuning is by changing the software. Personally I am not willing to spend a couple hundred bucks to find out if the people relating their experiences are right or wrong. I'll just wait.
#13702 of 18329 RE: Safety inspections
Jan 08, 2004 (2:34 pm)
We used to have them here in California, 30+ years ago - before I could drive. The used to have spot checks where they'd pull cars over and inspect them, sort of like the "sobriety checkpoints" they have now. What a hassle if you were running late!
They were replaced in the 70's by the smog check - back when California was the only state to do this.
#13703 of 18329 Corsa Performance Exhaust tip
Jan 08, 2004 (2:44 pm)
Just wanted to log on with an update i have an 02 Envoy XL SLT with 23,000 miles on it. Truck is running great just put the Exhaust tip on the truck looks great. Was wondering since everyone is talking performance has anyone used that product called the Tornado Air? i was wondering if it does help gas mileage. Just this past weekend did mostly all highway driving from Pa to Conn. on Rt 84 a few hills also i got 18.8 on Dic and when i filled up it was right on the money. i have a 3.73 rear and it was driving an average of 315 miles at 65 to 70 mph. any feed back would be great thanks in Advance
#13705 of 18329 Tornado and stuff
Jan 08, 2004 (4:58 pm)
Thank you for posting this. I love it when people actually do quantitative tests on these gadgets. I wish I could think of some gimmick to make money on. Hmm, maybe aerodynamic paint.
#13706 of 18329 Envoy HP Parts
Jan 08, 2004 (8:51 pm)
Thanks 01 hoe.
Mine is 2-wheel drive w/o the LL suspension. I had a friend/mechanic with lift, spring compressor, alignment guages, etc. help me with the Eibachs on a Saturday a.m. Not an average-joe weekend project. I got them from TireRack and once again, I can't recommend them strongly enough.
Thanks for the heads-up on a programmable rather than a chip. Something to check on further.
Jan 09, 2004 (8:13 am)
Went through this debate with a friend that has a Tornado on a Toyota pickup. He "thinks" it helped, but not sure. Placebo effect?
My question would be on one of these 4.2s, if a Tornado is installed in the air duct, ahead of the air resonator ass'y, then the air enters the resonator on top of the engine, that would effectively straighten out the spinning around air. Then, even if the air was still spinning around as it enters the intake port, what happens when it enters the Vortec head design? Is the Tornado swirl clockwise and the Vortec putting a counter-clockwise spin (or vice-versa) on it, effectively cancelling out the spin? Hmmm...
The 6¢ resistors being sold as "chips" for $10-20 that claim to boost power 17 hp are another gimmick, being sold on that auction web site every one knows.. just a warning.
#13708 of 18329 Bose Amplifier Location
Jan 09, 2004 (12:39 pm)
Anbody know where the Bose amplifier is on the 2002+ Envoys??