1985 GMC K10 Sierra Classic 4x4

Description

The 1985 GMC K10 Sierra Classic 4x4, part of the third generation of GM’s C/K series (1973–1987), was the half-ton, four-wheel-drive variant — with the “K” denoting 4WD and “10” indicating its light-duty classification. The Sierra Classic trim was the top-tier offering, featuring upgraded interior materials, woodgrain dash accents, plush carpeting, and chrome exterior trim. 

Under the hood, the 1985 K10 offered several engine options, including the durable 5.0- and 5.7-liter V8s, and the fuel-efficient 6.2-liter Detroit Diesel V8, which was popular among those seeking better mileage and torque for towing. Most models came equipped with either a four-speed manual or the TH700R4 four-speed automatic transmission, which included an overdrive gear for improved highway efficiency. The K10’s part-time 4WD system was operated via a floor-mounted transfer case shifter, allowing drivers to switch between 2H, 4H, and 4L modes. Its solid front axle and leaf spring suspension made it a capable off-roader and workhorse. 

In 1985, GM also introduced subtle updates to the K10, including improved rustproofing and revised trim packages. The Sierra Classic stood out with its two-tone paint schemes, like the Indian Bronze and Doeskin Tan that this truck wears, and optional rally wheels or chrome bumpers. 

Highlights 

• Finished in two-tone Indian Bronze Metallic and Doeskin Tan paint over Saddle Tan cloth interior 

• Powered by a 6.2-liter Detroit Diesel V8 engine rated at 130 hp and 240 lb-ft of torque 

• TH700R4 four-speed automatic transmission 

• 4WD transfer case floor shifter 

• Maintenance under current ownership: 

  • New water pump 

  • New headlights 

  • New rear universal joint 

  • New Mastercraft Courser MXT 32x11.50R15LT tires (5,000 miles) 

  • New flex plate 

  • New transmission seals, gaskets, and bushings 

  • Transmission rebuilt with shift kit, master rebuilt kit, and new torque converter 

• Clean CARFAX Vehicle History Report  

Features 

• Some options on this 1985 GMC K10 Sierra Classic 4x4 include: 

  • 1DC4 Intermittent wiper system 

  • 1K34 Electronic speed control 

  • 1NA6 High altitude emissions  

  • 1N33 Comfortilt steering wheel 

  • 1P11 Glide-out spare tire 

  • 1U58 AM/FM stereo radio 

  • 1YE9 Sierra Classic Equipment 

  • 1YZ4 Two Tone Paint 

  • 1A01 Tinted Glass 

  • 1GT4 Rear axle 3.73 

  • 1LN2 Auxiliary fuel tank 

  • 1N67 Rally Wheels 

  • 1U35 Quartz electric clock 

  • 1V76 Towing device 

  • 1YH6 Gold Medal Special 

• Air conditioning 

• Cruise control 

• 85 mph speedometer 

• AM/FM stereo 

• Passenger vanity mirror   

Known Imperfections 

• Multiple paint chips and scratches on exterior, which was repainted many years ago 

• Bottom of passenger door has a couple of small surface rust patches due to chipped paint 

• Driver’s side of bench seat is worn and torn 

• A/C may need to be serviced to blow cold (all original components) 

Included 

• Owner’s manual 

• Maintenance and warranty booklets 

Ownership History 

The accompanying CARFAX Vehicle History Report for this 1985 GMC K10 Sierra Classic does not begin until 19 August 1992 in Dallesport, Washington, with 113,854 miles reported. The truck was sold twice in 2023 and currently resides in Leoma, Tennessee. The seller says, “This is a rare survivor 4x4 diesel square body that has never been lifted or modified.”