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TimfmCT's avatar
TimfmCT
Explorer
Aug 12, 2015

Catalytic converters for 2005 workhorse with GMC 8.1 vortec

Our 2005 Tiffin Allegro has the GMC 8.1 on the workhorse chassis. It's got 58,000 miles on it. We've had it for 6 years. Last year we replaced the transmission cooler assembly (rusted out) this year w...
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DSDP_Don's avatar
DSDP_Don
Explorer
Aug 14, 2015
Tim....Don't mess with a disintegrating muffler. The carbon monoxide poisoning will slowly overtake you without you even knowing it.

You don't need anything fancy. Find a truck shop that does mufflers and have them install a generic muffler.

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