Whistling Transmission…Humming Fuel Tank..
Question:
Then get out of a GM 4×4 newsgroup!!! – Hide quoted text — Show quoted text – > Glad I bought a Toyota, 30,000 miles and no problems 
> hello all, my new Chevrolet 3500 with 5.7L & Heavy duty transmission is > creating a whistling when in Overdrive. This is not noticeable on flat > surfaces, but going uphill through smokies on Interstate it is audible > until > rpm’s are above 15k. Also during first start of day, I get a humming > that > comes from the vicinity of the fuel tank, this will last for 30 minutes to > an hour, and is independent of fuel level. Any one have similar > experiences > or suggestions as to the cause. The dealer will get a shot on Tuesday > less than 2K miles on truck ). > — > Christopher C. Bullinger > A man hears what he wants to hear > and disregards the rest. > P. Simon
Response:
automatic transmissions will often make a whining sound if the pump is going bad. the dealer or a trans. shop should be able to do a pressure check on your transmission to see if the pump is developing the proper fluid pressure. -rob – Hide quoted text — Show quoted text – >hello all, my new Chevrolet 3500 with 5.7L & Heavy duty transmission is >creating a whistling when in Overdrive. This is not noticeable on flat >surfaces, but going uphill through smokies on Interstate it is audible until >rpm’s are above 15k. Also during first start of day, I get a humming that >comes from the vicinity of the fuel tank, this will last for 30 minutes to >an hour, and is independent of fuel level. Any one have similar experiences >or suggestions as to the cause. The dealer will get a shot on Tuesday > less than 2K miles on truck ). >– >Christopher C. Bullinger > A man hears what he wants to hear > and disregards the rest. > P. Simon
Response:
they finished up their line of the old body style with the "classic" badge. The new truck has a totally different engine series… – Hide quoted text — Show quoted text -> Hi. > I just bought a used ’99 Silverado (old body style) ex-cab 4×4 w/ > 5.7L, 18,000 mi. I have heard a similar humming sound when I first > start my truck. I can hear it best with my ear between the cab and the > bed. Mine sounds kinda like a teapot whistle only lower pitched. I > think it may be coming from the catalytic converter. Please follow up > with your dealers input. > Also, does anybody know why Chevrolet put out the ’99’s with the old > and the new body style with different engine choices in the same year? > Will Rhyne >hello all, my new Chevrolet 3500 with 5.7L & Heavy duty transmission is >creating a whistling when in Overdrive. This is not noticeable on flat >surfaces, but going uphill through smokies on Interstate it is audible until >rpm’s are above 15k. Also during first start of day, I get a humming that >comes from the vicinity of the fuel tank, this will last for 30 minutes to >an hour, and is independent of fuel level. Any one have similar experiences >or suggestions as to the cause. The dealer will get a shot on Tuesday > less than 2K miles on truck ). >– >Christopher C. Bullinger > A man hears what he wants to hear > and disregards the rest. > P. Simon
Response:
Hi. I just bought a used ’99 Silverado (old body style) ex-cab 4×4 w/ 5.7L, 18,000 mi. I have heard a similar humming sound when I first start my truck. I can hear it best with my ear between the cab and the bed. Mine sounds kinda like a teapot whistle only lower pitched. I think it may be coming from the catalytic converter. Please follow up with your dealers input. Also, does anybody know why Chevrolet put out the ’99’s with the old and the new body style with different engine choices in the same year? Will Rhyne – Hide quoted text — Show quoted text – >hello all, my new Chevrolet 3500 with 5.7L & Heavy duty transmission is >creating a whistling when in Overdrive. This is not noticeable on flat >surfaces, but going uphill through smokies on Interstate it is audible until >rpm’s are above 15k. Also during first start of day, I get a humming that >comes from the vicinity of the fuel tank, this will last for 30 minutes to >an hour, and is independent of fuel level. Any one have similar experiences >or suggestions as to the cause. The dealer will get a shot on Tuesday > less than 2K miles on truck ). >– >Christopher C. Bullinger > A man hears what he wants to hear > and disregards the rest. > P. Simon
Response:
i get a noise coming from the in-tank electric fuel pump on my s-10 when i start it up. it lasts for about 5-10 minutes. could this be what you’re hearing? -rob – Hide quoted text — Show quoted text – >Hi. > I just bought a used ’99 Silverado (old body style) ex-cab 4×4 w/ >5.7L, 18,000 mi. I have heard a similar humming sound when I first >start my truck. I can hear it best with my ear between the cab and the >bed. Mine sounds kinda like a teapot whistle only lower pitched. I >think it may be coming from the catalytic converter. Please follow up >with your dealers input. > Also, does anybody know why Chevrolet put out the ’99’s with the old >and the new body style with different engine choices in the same year? > Will Rhyne >hello all, my new Chevrolet 3500 with 5.7L & Heavy duty transmission is >creating a whistling when in Overdrive. This is not noticeable on flat >surfaces, but going uphill through smokies on Interstate it is audible until >rpm’s are above 15k. Also during first start of day, I get a humming that >comes from the vicinity of the fuel tank, this will last for 30 minutes to >an hour, and is independent of fuel level. Any one have similar experiences >or suggestions as to the cause. The dealer will get a shot on Tuesday > less than 2K miles on truck ). >– >Christopher C. Bullinger > A man hears what he wants to hear > and disregards the rest. > P. Simon
Response:
Glad I bought a Toyota, 30,000 miles and no problems
– Hide quoted text — Show quoted text -> hello all, my new Chevrolet 3500 with 5.7L & Heavy duty transmission is > creating a whistling when in Overdrive. This is not noticeable on flat > surfaces, but going uphill through smokies on Interstate it is audible until > rpm’s are above 15k. Also during first start of day, I get a humming that > comes from the vicinity of the fuel tank, this will last for 30 minutes to > an hour, and is independent of fuel level. Any one have similar experiences > or suggestions as to the cause. The dealer will get a shot on Tuesday > less than 2K miles on truck ). > — > Christopher C. Bullinger > A man hears what he wants to hear > and disregards the rest. > P. Simon
Response:
Just to update the group, dealer said he would replace fuel pump at 3k oil change, pump noise is really subjective, heard 3 different levels on both classic C/K’s and new Silverado. As far as pump goes, dealer "Nesmith" Hinesville GA. would replace for peace of mind. Tranny noise, wrote it up on ticket for the record, but again, heard it on several other heavy duty trans on the lot. I have been driving 5 speeds for the last 15 years, and I guess it may be something I haven’t been used to. Whistling was never really loud, but noticeable at certain rpm ranges in first gear. dealership has been around for 25 years, and they swear, the 4L80E tranny is as solid as they come. — Christopher C. Bullinger A man hears what he wants to hear and disregards the rest. P. Simon
– Hide quoted text — Show quoted text -> I don’t know on the tranny, but i would bet the fuel pump is cold for the > first 30 min causing the humming in the tank. My ‘87 S-10 is the loudest > thing on the truck. > hello all, my new Chevrolet 3500 with 5.7L & Heavy duty transmission is > creating a whistling when in Overdrive. This is not noticeable on flat > surfaces, but going uphill through smokies on Interstate it is audible > until > rpm’s are above 15k. Also during first start of day, I get a humming > that > comes from the vicinity of the fuel tank, this will last for 30 minutes to > an hour, and is independent of fuel level. Any one have similar > experiences > or suggestions as to the cause. The dealer will get a shot on Tuesday > less than 2K miles on truck ). > — > Christopher C. Bullinger > A man hears what he wants to hear > and disregards the rest. > P. Simon
Response:
I don’t know on the tranny, but i would bet the fuel pump is cold for the first 30 min causing the humming in the tank. My ‘87 S-10 is the loudest thing on the truck.
– Hide quoted text — Show quoted text -> hello all, my new Chevrolet 3500 with 5.7L & Heavy duty transmission is > creating a whistling when in Overdrive. This is not noticeable on flat > surfaces, but going uphill through smokies on Interstate it is audible until > rpm’s are above 15k. Also during first start of day, I get a humming that > comes from the vicinity of the fuel tank, this will last for 30 minutes to > an hour, and is independent of fuel level. Any one have similar experiences > or suggestions as to the cause. The dealer will get a shot on Tuesday > less than 2K miles on truck ). > — > Christopher C. Bullinger > A man hears what he wants to hear > and disregards the rest. > P. Simon
Response:
hello all, my new Chevrolet 3500 with 5.7L & Heavy duty transmission is creating a whistling when in Overdrive. This is not noticeable on flat surfaces, but going uphill through smokies on Interstate it is audible until rpm’s are above 15k. Also during first start of day, I get a humming that comes from the vicinity of the fuel tank, this will last for 30 minutes to an hour, and is independent of fuel level. Any one have similar experiences or suggestions as to the cause. The dealer will get a shot on Tuesday less than 2K miles on truck ). — Christopher C. Bullinger A man hears what he wants to hear and disregards the rest. P. Simon
Response:
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