K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Owner Notification Letter
Dear GMC Truck Owner:
Product improvements were made on all 1991 Sierras and Suburbans equipped with automatic transmissions to help in maintaining the proper
transmission fluid level. Transmission fluid level is very important to transmission life and performance; therefore, GMC Truck will make these
improvements on 1988-90 C/K Sierras and R/V Suburbans.
