K 2500 Truck 4WD V8-379 6.2L DSL (1988)
Wheel Fastener: Technical Service Bulletins
Wheel - Nut/Stud Sizes
GMC NUMBER:
88-T-14
GROUP:
3E - Wheels & Tires
DATE:
April, 1987
CORPORATE
NUMBER:
893501R
SUBJECT:
WHEEL NUT/STUD SIZES
MODELS:
1988 C/K TRUCKS
The 1988 C/K series pick-up trucks use new M14 x 1.5 thread size wheel nuts and studs, which are different from those used on any other model truck
produced by GM. This is the first usage for this metric size on any GM vehicle, therefore, care must be taken so that the correct size nuts are used with
their exact corresponding size studs. If intermixed, stripped threads and/or improper torques could result. Metric nuts are stamped with the word
"Metric". Metric studs may be stamped with an "M" or "Metric".
Thread Size
Wrench Size
Truck Application
M14 x 1.5
22 MM
C/K Truck
