2015 GMC Sierra 5.3 L w/Towing package Radiator fitment?

[Outdoors_Guy_88]

I have a 2015 GMC Sierra 1500 Extended Cab 4WD 6 sp. with a 5.3L-Gas - Work truck package with the factory installed towing package.

 

Now, I have developed the dreaded coolant leak crack in the radiator.  I located the thermostat upgrade to prevent thermocycling.

 

There seems to be a couple different radiators listed for this truck. 84207656 and 84207654 both seem to be correct on GM parts websites.

 

Anyone know the proper fitment?  Any way to confirm before pulling the old radiator out?

 

[mikeyk101]

When you mention the towing package, do you have the factory brake controller on the dash? The reason I ask this is because mine came with the trailering equipment package but that doesn't include the factory brake controller. The package is basically just adding G80 auto locking rear end. The RPO for this package is Z82 that's listed on the label in glove box. Now the towing package IIRC also includes the factory brake controller and a larger radiator and is also referred to as the NHT package or the Max Trailering Package. 

 

The 84207656 lists it as the one for the Max Trailering Package. The 84207654 seems to be for the rest of the models.

Edited May 15, 2023 by mikeyk101

[Outdoors_Guy_88]

6 hours ago, mikeyk101 said:

When you mention the towing package, do you have the factory brake controller on the dash? The reason I ask this is because mine came with the trailering equipment package but that doesn't include the factory brake controller. The package is basically just adding G80 auto locking rear end. The RPO for this package is Z82 that's listed on the label in glove box. Now the towing package IIRC also includes the factory brake controller and a larger radiator and is also referred to as the NHT package or the Max Trailering Package. 

 

The 84207656 lists it as the one for the Max Trailering Package. The 84207654 seems to be for the rest of the models.

Yes, mine has the factory installed brake controller in the dash and factory installed towing mirrors.

 

Relevant RPO codes I have: MYC, Z82, Z85, Z88, but no NHT listed.  Is this still 84207656?

[rav3]

Check this link out. Here's the specs for the 656, which says it replaces the 654

 

84207656 - Radiator 2014-2017 GM | Wholesale.Parts

[mikeyk101]

4 hours ago, rav3 said:

Check this link out. Here's the specs for the 656, which says it replaces the 654

 

84207656 - Radiator 2014-2017 GM | Wholesale.Parts

Aha! Good catch