Last post on Apr 30, 2012 at 7:10 PM
You are in the Buick Rainier
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Chevrolet TrailBlazer, GMC Envoy, Buick Rainier, GMC Envoy XL, Isuzu Ascender, Oldsmobile Bravada, SUV
#8909 of 18329 Re:Electrical hum by gam2
Nov 23, 2002 (5:02 pm)
Don't know if this is what your hearing but...
TSB 02-08-44-016 September, 2002
Subject:Whine, Buzz, Generator Whine, Whine Type Noise Heard on Acceleration (Repair Vehicle Sound System Wiring)
Models: 2003 Chevrolet TrailBlazer
2003 GMC, Envoy
2003 Oldsmobile Bravada
Built Prior to December, 2001
Some customers may comment on a buzzing or generator whine-type noise. that emanates from the vehicle speakers with the radio on or off and when the headlights are on. This sound may be altered by changing the IP backlighting intensity (Dimming Function). Or, a noise emanates from the All-Wheel Drive system (if equipped), of 1 to 2 seconds duration during initial acceleration, at 24 km/h (15 mph) or at 48 km/h (30 mph). The generator whine-type noise may be observed at any time, however it is more noticeable when the electrical load on the system is high.
The cause of this condition may be EMI interference that is being transmitted to the radio system speakers from within the body wiring harness.
To determine which parts to order, you will need to inspect the vehicle. There are four types of audio systems available and three specific service wiring harness assemblies.
1.Make Service Appointment
#8910 of 18329 The fine print of a TSB
Nov 23, 2002 (5:08 pm)
GM bulletins are Intended for use by professional technicians,
NOT a "do-It-yourselfer . They are written to Inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of vehicle. Property trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the Information.
#8911 of 18329 fine print: by nuyorkah
Nov 23, 2002 (7:41 pm)
According to the fine print in the above tsb, there are 2003 tripletts which were built before Dec. 2001. is this possible? When did GM start using generators again? I guess these are the first cars in which GM has installed radios and speakers, how else could they explain a 2003 model car with induced whine or hum noise in speaker wiring. A whine that is more pronounced during periods of heavy electrical load would indicate an inadequate electrical source supply. It appears GM has used pre-high school grads to design the tripletts. Either that or GM is not qualified to produce a drive by wire car yet.
Please forgive my whining today. I learn more each day by reading these posts. I do not enjoy reading of the G M fixes to the problems.
Nov 23, 2002 (9:55 pm)
Just got my bill for next year. The 2002 Trailblazer LS 4x4 is $440 & The 2000 Impala LS is $444 for a full year of 100k/300k coverage w/ 500 deductible on collision. NY is supposed to be high. what does everyone else pay. I think these are good prices
#8913 of 18329 Insurance in AZ
Nov 24, 2002 (8:18 am)
quote; "The 2002 Trailblazer LS 4x4 is $440 & The 2000 Impala LS is $444 for a full year of 100k/300k coverage w/ 500 deductible on collision."
We pay that amount every 6 months here in AZ on a 2001 Ford F150 and similar amounts on a 2000 Silverado 1500. Clean driving records I might add. We are in the 45-54 age group.
When we moved to Gilbert from the city of Glendale, the change in zip code dropped our inurance rates $150.00 a year on the same vehicles/ coverage.
Nov 24, 2002 (2:17 pm)
I special ordered a 2003 TB with a 3.42 axle and I have been pleasantly surprised with the gas milage. I've filled up four times and the MPG has been 17.5, 18.5, 17.6, and 18.6. Not bad for a new car and much better than my son's Envoy not equipped with a 3.42 axle. And I certainly don't lack for power, especially living in "flat" Florida.
#8916 of 18329 3.42 Axle by genemo3
Nov 24, 2002 (4:43 pm)
What type of driving does this involve, that is city versus straight hiway? In city driving, do you have a lot of stop and go or just occasional stop signs and lights? Also, have you noticed at what rpm does you TX shift from 1st to 2nd and 2nd to 3rd? This will help us compare with your model. Thanks.
Nov 24, 2002 (5:06 pm)
Jurassic3k, that looks like a snap from the recent SEMA show in Vegas. Try searching sema.org for accessories if no one here can give you brand specifics.
Nov 24, 2002 (6:30 pm)
I am looking at purchasing a '99 Bravada. Do not know much about this line of SUV. Reasonable price and nice SUV. Any thoughts, advice, pearls of wisdom?