FixVault

Section 6 (Power Steering General Servicing): Service

WARNING: This page does not describe the selected car, but rather 110 other vehicles, including the 1987 GMC Vandura Special, 1987 GMC Vandura, 1987 GMC Value Van, 1987 GMC Suburban, and 1987 GMC Safari. However, it is still accessible from the selected car via links, so may be relevant.
BELT TENSION (1)

Application New Belt Used Belt
5/16" Belt 80 Max. (36 Max.) 50 Min. (23 Min.)
3/8" Belt 140 Max. (63 Max.) (2) 70 Min. (32 Min.)
15/32" Belt 165 Max. (75 Max.) 90 Min. (41 Min.)
(1) Tension in Lbs. (Kg.) Using Burroughs Tension Gauge
(2) Tension for used 3/8" cogged belt is 60 lbs. (27 kg). New cogged belt tension is the same as standard 3/8" belt.