Will a 88+ heater motor fit in 87?

[kelsfine69]

I have a few 88+ heater motors and my old 87 is starting to make bad noises(It was -30c last night). Was just wondering if anyone had had this work or not at all.

[68 TT]

Originally Posted by kelsfine69

I have a few 88+ heater motors and my old 87 is starting to make bad noises(It was -30c last night). Was just wondering if anyone had had this work or not at all.

There were some minor changes in blower motor designs. The only thing you can do it pull them both out and compare the wiring connection and see if one or both has the vent tube. Also the clocking of the vent tube changes too.

A new one is only $20 with a lifetime warranty so it is almost not worth the effort to put in a used one.

[3r!c84]

yeah but dont they have a higher speed on the newer ones?

[68 TT]

Originally Posted by 3r!c84

yeah but dont they have a higher speed on the newer ones?

I know the 88-up have more speed settings but that has nothing to do with the blower motor. I think high speed is the same on both with minimum resistance going through the fan speed resistor.

I think the 99-up new body style like my 03 Tahoe might have a higher output blower motor or just a more efficient squirrel cage design. It seems to have a very high output on full compared to any of my older rigs.

[Slonaker]

http://67-72chevytrucks.com/vboard/s...d.php?t=166446

Some good info...

Slonaker

[68 TT]

Originally Posted by Slonaker

http://67-72chevytrucks.com/vboard/s...d.php?t=166446

Some good info...

Slonaker

Sounds like they started putting higher output fans in the extended cabs & Blazers, probably the Suburbans too in the early 90's. I know my 90 rcsb Z71 did not have the higher speed fan.