1991 GMC Suburban: Doomsday Diesel Part 6
37-Inch Tires, Brutally Simple Suspension, and a Dozen Other Parts Built To Last Forever
When building a diesel truck you want to last, less is always more. Less plastic means more steel, fewer electronics means more reliability, reduced options means more capacity, and zero spark plugs means more power and fuel economy.
When we began our 5.9L Cummins-powered Doomsday Diesel project back in the January ’12 issue, we knew we wanted a low-tech truck that would be too simple to fail, yet easy to fix if it ever stopped running. We didn’t anticipate we’d be replacing or rebuilding everything that spins or holds fluid on this ’91 GMC Suburban —but that’s what we’ve done. As you can imagine, it’s taken us longer than we expected.
Why have we gone this far? Well, building a vehicle that will function through the apocalypse required an assembly of parts that we could be certain wouldn’t fail. The best way to gain that certainty was to inspect each critical component. The systems deemed worn out were rebuilt, those pieces seen as weak were upgraded, and the creature comforts discovered to be unnecessary were removed.
When Doomsday Diesel is complete, we expect to have an all-terrain vehicle with a 1,000-mile fuel range, seating for four, and virtual (if not actual) bulletproof durability. The true test of this machine will be an escape from Los Angeles scenario, in which we see what it really takes to escape this booby-trapped metropolis after society crumbles. Or we’ll just try to drive out of town on the Friday afternoon before Labor Day weekend.
Energy SuspensionSan Clemente, 92673
Rancho SuspensionMonroe, MI 48161
Rockland Standard GearSloatsburg, NY
LMC TruckLenexa, KS 66219
DynatracHuntington Beach, CA 92647
Borgeson UniversalTorrington, CT 06790
Industrial InjectionSalt Lake City, UT 84104
Reid RacingPleasant Hill, CA 94523
Mercenary Off RoadSun Valley, CA 91352
HutchinsonTrenton, NJ 08609
Lee Power Steering818-768-0371