1985 GMC High Sierra help needed! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Doc Morda · 05-10-2003, 02:22 PM

I can't find diagrams or pictures of stock exhaust, and really need them to pass inspection! Please help if u can! 350 4x4, Dual exhaust.

**jerry moss** · 05-10-2003, 03:38 PM

go to you local parts house or muffler shop, either one should have books with all the possiblities for your truck. one thing for sure, duals are not factory on your truck if the 350 is factory. some 85s came without a cat converter but all small block trucks had single exhaust. whether or not it came with a converter depends on the G.V.W..at least all this is true in calif.
i've been at the same muffler shop since your truck was built (85) and none of my books show duals on anything but heavy 3/4 or 1 tons with a big block. if my memory serves me correctly, the last year for duals on a small block (from the factory) was 78 and that was only on trucks equipped with a small block 400.

05-10-2003, 02:22 PM	#1
Doc Morda Registered User Join Date: May 2003 Posts: 2	1985 GMC High Sierra help needed! I can't find diagrams or pictures of stock exhaust, and really need them to pass inspection! Please help if u can! 350 4x4, Dual exhaust.

05-10-2003, 03:38 PM	#2
jerry moss Born Psycho Join Date: Feb 2001 Location: brentwood,cal,usa Posts: 4,783	go to you local parts house or muffler shop, either one should have books with all the possiblities for your truck. one thing for sure, duals are not factory on your truck if the 350 is factory. some 85s came without a cat converter but all small block trucks had single exhaust. whether or not it came with a converter depends on the G.V.W..at least all this is true in calif. i've been at the same muffler shop since your truck was built (85) and none of my books show duals on anything but heavy 3/4 or 1 tons with a big block. if my memory serves me correctly, the last year for duals on a small block (from the factory) was 78 and that was only on trucks equipped with a small block 400. __________________ jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA



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