1993 Pontiac Firebird Owner's Manual - Page 302

USAGE FLUID/LUBRICANT Rear Axle (Standard and Limited-Slip Differential) Hood Latch Assembly a. Pivots and Spring Anchor b. ReleasePawl Hood and door hinges, headlight door assemblies, rear folding seat, fuel door hinge, rear compartment lid hinges Weatherstrips Axle Lubricant (GM Part No. 1052271) or SAE 8OW-90 GL-5 Gear Lubricant. a. Engine oil. b. Chassis lubricant meeting requirements of NLGI Grade (GM Part No. 1052497) or equivalent. 2, Category LB or GC-LB Engine oil or Lubriplate Lubricant (GM Part No. 1050109). Dielectric Silicone Grease (GM Part No. 12345579) or equivalent. See "Replacement Parts'' in the Index for recommended replacement filters, valves and spark plugs.