What is this?

[Keitha]

The answer is probably very obvious, but I can not figure it out. What is this box (with the heat sink) atached under the steering column of my 1991 Suburban?

thanks,

 

[TheBeast_88K5]

heater core?

 

[Z71paramedic]

No, that's a heat sync on there...got to be some type of computer/chip in there. Is it your PCM? Not sure where those are mounted on your body style truck

 

[ljlackey]

Cruise control maybe if you have it???

 

[dremu]

Delay wiper controller, IIRC.

The heat sink would only be for high-current transistors, not for relatively low-powered microprocessor devices like the computers for the engine and transmission.

-- A

 

[frankin5]

The answer is probably very obvious, but I can not figure it out. What is this box (with the heat sink) atached under the steering column of my 1991 Suburban?

thanks,

delay module for windshield wipers

 

[ryoken]

yup, delay module....

 

[Slapperbar]

Def wiper delay.

 

[Keitha]

Thanks. Yah, Not the PCM, that lives behind the glove box. Defenitly not the heater core. I would have never guessed the Wiper delay, but I'll go with that.

Thanks again,

 

[diesel4me]

One sure way to tell what it is,is to unplug it,then see what no longer works!.......I think its the delay wiper module too...