Sierra TK15543 VS. TK15743

breimler · August 29, 2016

I'm looking at invoices for 2016 sierra 1500's and I'm seeing that there are two different base model #'s. TK15543 and TK15743. They both read that they are Sierra 1500 4WD Crew Cab. The TK15743 is $300 more on the invoice than the TK15543. I've searched the web and I'm not having any luck finding out the difference between the two. Does anyone here know the difference? What would make one more than the other?

Thanks in advance!

newdude · August 29, 2016

How to read the GM model code:

Example code: CK25903 is a Chevrolet, Four wheel drive, Regular cab Long Box.

C/T: Identifies the brand/manufacturer. Chevrolet © or GMC (T)

C/K: Identifies drivetrain. Two wheel drive © or four wheel drive (K)

15/25/35/36: Identifies truck "Series". 1/2 ton trucks (15), 3/4 ton trucks (25), 1 ton trucks (35) and 1 ton chassis cabs (36. These are the full on chassis cabs, rather than a "box delete" truck. Box deletes are 15/25/35 designation).

5/7/9: Identifies box size. 5ft8in "Short" box (5), 6ft6in "Standard" box (7) 8ft "Long" box (9)

03/53/43: Identifies cab configuration. Regular cab (03), Double/Ext. Cab (53), Crew cab (43)

So. A TK15543 vs. a TK15743? TK15543 is a crew cab short box, and the TK15743 is a crew cab standard box. As for price, bigger the box, the higher the price, albeit not by much $$$.