2003 S10 4.3 engine rattle

On my 2003 S10 4.3 liter (52,000miles) when I accelerate around 2 to 3 thousand rpm's I get a rattle. I can put into park and slowly run up to the 1800 rpm area and hear it. It sounds similiar to pre ign noise. Could this
be the timing chain tensioner? I asked the dealer about this before it went out of warranty and he said it was probably a rattling sheet metal componet somewhere. It has been doing this all along-never any better or worse. Thanks for any help.
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There is no tensioner on timing chain. Noises like this can be hard to find. Without hearing it I would suggest you look for loose shields around spark plugs and loose clamps or brackets on exhaust. It could be a baffle in a muffler or CAT too. Check water pump for slop and the clutch fan too. Also does it change sound when A/C is on or off? ----------------- TheSnoMan.com
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My 93 Blazer did it, My 2003 s-10 pickup is doing it, the dealer sez they all do it, but my new Toyota WON"T ! I think its piston slap ,but I really don't care ...after 40 years of apple pie and Chevrolet, I trying something else.

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My 2003 S-10 ZR-2 started buzzing and rattling a couple of years ago. It happens worst right at 1500 rpm, but can also be heard at around 3000. The culprit is the metal bands that hold the heat shield on the muffler. They both came loose.
I stuck a small stainless steel bolt under both bands and that solved the problem for a while. Eventually one of the bands snapped. I replaced it with a length of copper wire twisted tight. Sooner or later the other one will snap and I will do the same fix.
Nine warranty repairs, a starter just 2 weeks after warranty expired and assorted other small problems (flaky wiper control, anyone?) ... The next truck won't be a Chevy.
News wrote:

--
Bill Gee

There are no 'X' chars in my email address.
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Bill,
I just finished repairing my funky wiper control. That again is another long standing GM trouble...Take the circuit board out of the wiper motor and resolder all the connections on the board, it will then work. I had to do this with my 77 full size pickup, my 93 Blazer, and also my 2003 s-10....take a look at your hoses that run to the oil cooler, mine had to be replaced just like my 93!! Quality...
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The new ones will do the same thing. I take the originals to a hose supply shop. They remove the fitting ends from the originals, then fasten them to new steel braid line and NEVER deal with them leaking again. The best thing about it, the cost is cheaper to have them custom made verses replacing them from the dealer.
James
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