Those with a 1989-1991 Crew Cab...

[90blzr]

Can you check and see what plant your truck was made at? Just post the 11th digit of your VIN

The eleventh symbol is a letter or number indicating the assembly plant: A=Lakewood, B=Baltimore, F=Flint, J=Janesville, S=St. Louis, V=Pontiac, 1=Oshawa, Canada, 3=Detroit, 4=Scarborough, Canada, 7=Lordstown.


We were discussing this on another board and trying to find some reason why only the crew cabs didnt receive the serpentine set up from these years, when all of the Blazer and Suburbans of those years did. Trying to figure out if all of the crewcabs were made at the same plant, possibly partial reason for none of them having serpentine belt set ups like the burbans and blazers of the same years.

Mine is a 1991 Crew Cab 454, 4x4 assembled in Flint
Thanks!

[ElGracho]

Do these crew cabs have TBI? I would say it's more of a heavy duty vs. light duty emissions question than a plant question. The subs are 1/2 or 3/4 ton and the blazers all being 1/2 tons all fall into the Light duty emissions category while all the R/V series crew cabs were 1 tons and in the Heavy Duty emissions category then.

I know of an 87 Cab and Chassis that not only doesn't have serpentine belts, but it also still has a carb where the rest of the 87 gas engines (subs, blazers and pickups) switched over to TBI.

[u2slow]

My '91 crew is built in Flint also.

Originally had a 350 TBI and *no* options. (I'm changing it to diesel now.) It had the half-serpentine, hydroboost, and no AIR pump.

It was even manufactured as a SRW cab & chassis.

[90blzr]

Originally Posted by ElGracho

Do these crew cabs have TBI? I would say it's more of a heavy duty vs. light duty emissions question than a plant question. The subs are 1/2 or 3/4 ton and the blazers all being 1/2 tons all fall into the Light duty emissions category while all the R/V series crew cabs were 1 tons and in the Heavy Duty emissions category then.

I know of an 87 Cab and Chassis that not only doesn't have serpentine belts, but it also still has a carb where the rest of the 87 gas engines (subs, blazers and pickups) switched over to TBI.

Yeah, these crew cabs had the TBI, at least all that I have seen. As far as the heavy duty/light duty thoughts, maybe, but the burbans/blazers etc had the same engines other than the belt set up. That is the only thing different. Not sure how the belt set up would change emissions?

Keep the ideas coming though!!

Also, 92+ crew cabs (1tons) all had the serpentine set up.