Part Identification please....

[Jolly Roger]

I was peering behind my grill today and noticed a very small "cooler" looking apparatus on the drivers side just left of the headlight. Looks like a tiny cooler of some sort. Anyone know what it is?

 

[Jolly Roger]

Lots going on back there it seems...

 

[iamdub]

Power steering cooler.

That trans cooler- it's factory?

 

[Jolly Roger]

Power steering cooler.

That trans cooler- it's factory?

Power steering cooler? Never heard of one lol
Its all factory, strange Government vehicle...

 

[iamdub]

Power steering cooler? Never heard of one lol
Its all factory, strange Government vehicle...

Here it is on a Silverado (all the same):

That power steering cooler might be standard on 4WD or part of a special package, like the heavy-duty trailering package. Do you have a hydraulic brake booster?

I need the lines for your style of trans cooler for an aftermarket one that I'm adding. Gonna look up the OEM stuff since I now know they were a factory option.

 

[Jolly Roger]

Here it is on a Silverado (all the same):

That power steering cooler might be standard on 4WD or part of a special package, like the heavy-duty trailering package. Do you have a hydraulic brake booster?

I need the lines for your style of trans cooler for an aftermarket one that I'm adding. Gonna look up the OEM stuff since I now know they were a factory option.

Yes on the hydraulic brake booster, I thought thats the only way they came?

 

[iamdub]

Yes on the hydraulic brake booster, I thought thats the only way they came?

I wish! I'd love to have hydraboost! That explains the cooler (I think). Between the 4WD putting a little extra stress on the steering and the brake booster running off of the power steering pump, that cooler keeps things in check.

 

[alpinecrick]

In the GMT400's power steering coolers were common on 2500, 3500, and 3500HD's, w/hydroboost. The GMT800 Suburbans and Tahoes usually had one. A lot of folks mistake it for a engine oil cooler.

The trans cooler looks like a fin and plate cooler, never seen one of those on GMT800' and 900's, it was always a stacked plate cooler or tube and fin. But if it is a former government fleet vehicle.........

 

[George B]

I have a PS cooler on my 13 suburban. It has vacuum brakes

 

[Jolly Roger]

Naw...wait! Mines not hydroboost, mine is vacuum.
My apologies for the confusion gents, I had a ***** moment.

 

[Jolly Roger]

In the GMT400's power steering coolers were common on 2500, 3500, and 3500HD's, w/hydroboost. The GMT800 Suburbans and Tahoes usually had one. A lot of folks mistake it for a engine oil cooler.

The trans cooler looks like a fin and plate cooler, never seen one of those on GMT800' and 900's, it was always a stacked plate cooler or tube and fin. But if it is a former government fleet vehicle.........

Yeah im still trying to figure out who had it before me. The RPO's looks like it was ordered that way.
(KNP) for the "COOLING SYSTEM TRANS HD" and the (GAM) for "VEHICLE GOVERNMENT G.S.A. SALES"
Judging by the VIN # it was obviously owned by Sean Connery at one point.. jk

 

[gooffeyguy]

My Denali has that cooler on it. I was told it's power steering cooler.

Sent from my SM-G930V using Tapatalk

 

[Rocket Man]

My 02 Denali has a power steering cooler on it as well.

 

[Jolly Roger]

I didnt know it extended to the top of the radiator, I thought it was about as big as a pack of smokes..
I just had the P.S. fluid changed and they didnt say anything about about it. Looks to be pretty common. Thank you everyone for the schoolin!