1994 GMC Suburban Owner's Manual - Page 361

USAGE Key Lock Cylinders FLUIDLUBRICANT Engine Oil (GM Part No. I050 109 or equivalent) or a synthetic light weight engine oil (SAE 5W-30). Chassis Lubrication Chassis Lubricant (GM Part No. 12346003 or equivalent)or lubricant meeting requirements of NLGI Grade 2, Category LB or GC-LB. Windshield Washer SolventGM Optikleen washer solvent (GM Part and Anti-Freeze No. I05 15 I5 or equivalent). Weatherstrip Squeaks Weatherstrip Conditioning Outer Tailgate Handle Pivot Points Spray-A-Squeek (GM 1052277). Part No. Dielectric Silicone Grease (GM Part No. 12345579 or equivalent). Multi-Purpose Lubricant (GM Part No. 12345120 or equivalent). 7-27