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OBS PARTS BUYER’S GUIDE | All The GMT400 Parts You Need to Know About!

Chris Hamilton September 15, 2020 OBS Builders Guide

Suspension Upgrades

1. QA1 C1500 Coilover Conversion Systems

Add modern performance to a pickup that was designed for utility. With QA1’s bolt-on front and rear systems, not only can you lower your C1500, but you’ll also have ride height adjustability on all four corners, giving you that perfect, level stance. The front systems offer up to 5-inch of drop with drop spindles, and control arms provide more room for wider wheels and tires. The rear system offers up to 7 inches of drop, and the torque arm design reduces binding found in other four-link systems.

Front: $2,298.66 Rear: $2,482.87


 2. Ridetech Coilover  Suspension System

Bolt-on coilover suspension systems dramatically improve handling and ride quality when lowering a truck to the 4/6 level or lower. The wishbone multi-link rear suspension, heavy-duty C-notches, tubular A-arms, drop spindles, HQ adjustable coilovers, Musclebar front sway bar, Delrin bushings and R-joints all work together to create the best ride imaginable. And best yet, this kit is also available in an air-ride configuration. 

MSRP: $5,900


 3. Western Chassis 4/6-inch Deluxe Lowering Kit

This deluxe lowering kit for ’88-’91 Chevy/GMC C1500 includes light duty spindles. Easy to install in your driveway!

MSRP: $668.88

Western Chassis

4. Belltech 5/7-inch Drop Kit

Lower your sport truck or SUV right the first time. Belltech’s complete lowering kits include all the parts and pieces you need to achieve not only the look you want, but the alignment, performance and safety you need. 

MSRP: $957.91


5. Choppin’ Block Modular 2.5-Inch Drop Spindle

This aluminum 2.5-inch drop spindle for GMT400 GM C/K 1500 2WD truck and SUV models features an OEM style GMT800 sealed hub conversion in dual 5×5, 5×4.75 or OEM 6×5.5 lug patterns. The Modular Truck spindles are also ABS-ready for ’95-’98 factory equipped trucks. The anodized finish will keep these beauties looking and performing great over the long haul. 

CB Chassis Products 

6. AldAn American Coilover Conversion

Aldan C1500 suspension packages are designed to convert your stock, front suspension to fully ride-height adjustable coilovers with adjustable shock absorbers in the rear. They’re designed for the GMT400 and C1500 2WD truck chassis.

MSRP: $915.95

Aldan American

 7. Ridetech Air Suspension System

This Air Suspension System is specifically designed for the ’88-’98 Chevrolet and GMC C1500 truck and includes everything needed to create modern drivability with an ultra-low show stance. The package contains front upper and lower control arms, front CoolRide with HQ Series shocks, front sway bar, drop spindles, rear wishbone with C-notches and Shockwaves.

MSRP: $5,900


8. OBS Chevy Racing Billet Control Arms

OBS Chevy Racing billet control arms are made out of T-6 6061 billet aluminum and designed to have the utmost in adjustability, strength, ease of use and cool style. Imagine being able to change your alignment in a few minutes depending on the activity. Simply jack up the truck a little to relieve pressure, loosen the top rod end bolts, change out your desired spacer, and you’re ready to go. These arms are great for autocross, road course racing and lowered trucks wanting to get that perfect alignment with style. Correct ball joint angle for lowered trucks, solid billet construction, solid connection through high-end rod ends.

MSRP: $799

OBS Chevy Racing

 9. Choppin’ Block ’88-’98 GM Tubular Control Arms

Looking to lay out your ’88-’98 full size truck on some 24s? Then you’ll be needing these! Includes one pair of upper and lower control arms, built-in lower bag brackets, built-in lower shock brackets and ball joints.

MSRP: $830

CB Chassis Products 

 10. Classic Performance Products Drop Springs

These 3-inch drop springs from CPP are available for a simple factory swap. Pair it with the company’s rear flip kit and shackles for a full 4/6 drop.

Classic Performance Products

 11. DJM 4/6-inch Drop Kit

The combination of Calmax arms and coils springs up front net you out 4 inches of drop without wheel clearance or alignment issues. and we put this together with our DJM 6-inch axle flip kit.

MSRP: $746.62

DJM Suspension

 12. Ridetech StreetGRIP System

StreetGRIP is a high-performance 4/6 drop lowering suspension system for ’88-’98 C1500 pickups. Like all StreetGRIP systems, Ridetech focuses on the areas of the OE suspension that need improvement rather than upgrading everything. In the case of ’88-’98 C1500s, that means keeping the factory control arms and leaf springs.

MSRP: $1,800



Looking to bag your OBS for an affordable price? AVS makes it easy with this complete all-in-one kit. 

MSRP: $2,950

AVS on the Web

Kit Includes:

  • Four Air Lift D2600 Dominator bag
  • One ’88-’98 Chevy/GMC full size trucks front brackets
  • One rear tubular bag brackets/bridge
  • One one-piece 2×4 notch
  • One parallel four-link with Panhard bar 1.50-inch
  • One rear shock tab kit
  • One Viair 444c compressor
  • One single compressor wiring kit
  • One AVS 5-gallon six-port M.P.M tank
  • One Air Lift water trap with autodrain
  • One 60-foot roll of 3/8-inch nylon reinforced D.O.T. approved air line
  • One air line cutter tool

 14. MaxTrac 2WD 4/6-inch Lowering Kit with Shocks

MaxTrac Suspension K330546 has an all-in-one solution for your 2WD ’88-’98 Chevy Silverado 1500. MaxTrac drop kits use 2-inch front spindles, 2-inch lowering springs as well as MaxTrac shocks for the front. The rear lowering uses a 6-inch rear flip kit with shock extenders, a rear C-frame support and MaxTrac shocks.

MSRP: $875.38

 15. GSI Complete Air Ride Chassis

This complete air-ride chassis for “Old Body Style” single cab 2WD GM pickups is engineered to provide the best ride quality and performance for a full-sized ‘bagged truck. Designed from the ground up with all new suspension geometry and modern drivetrain adaptability, this system also allows for large diameter wheels and most aftermarket engine accessories without worrying about any weird fitment surprises. 

GSI Machine & Fabrication 

 16. Elevated Concepts Direct Bolt-In Coilover Conversion Kit

In this kit, the control arms are narrowed 1-inch on each side for proper alignment; the ball joints are pushed forward ⅞-inch to re-center wheel; bushings are polyurethane, utilizing Moog ball joints; and sway bar heim attachments are included, along with Aldan American Direct bolt-in coils with your choice of spring rate.

MSRP: $1,750

Elevated Concepts

 17. BDS Suspension 6-inch Lift Kit

This tightly engineered 6-inch suspension lift kit is designed around two heavy duty upper A-arms, one-piece ¼-inch laser cut high clearance crossmembers and replacement steering knuckles. This combination offers zero track width change, unlike many knuckle kits on the market. Clears a 35×12.5-inch with 20×9 wheels and 5 ¼-inch backspacing.

MSRP: $2,173.59

BDS Suspension

This complete rear system incorporates both of the bolt-on four-link and cantilever kits together. Fabricated with the quality you’ve come to expect from KP Components, it is able to lay out most 24-inch wheel and tire combinations and offers you about 12 inches of travel right out of the box

MSRP: $1,699

KP Components

 19. MaxTrax Lift Kit

MaxTrac offers a 3-inch lifting front coil spring to easily raise your 2WD Chevy Silverado 1500 from the factory stance. MaxTrac also offers a 4-inch lifting block kit for your 2WD ’88-’98 Chevy Silverado 1500. An alternative is the company’s 2-inch rear lifting shackles. Not only are these easier to install than blocks, but they can be combined with a rear block to get additional lift or be used to simply fine tune the ride height of the rear.


 20. React Rear Coilover Conversion

This rear-only suspension kit from React converts the factory suspension in your 88-98 Chevy truck to a parallel 4-link setup with a panhard bar, c-notch, u-bolts and a rear frame crossmember. This kit is adjustable down to a 7-inch drop in the rear. All made in the USA, so you know it’s solid quality.


QA1 Rod Ends for Panhard Bar
Satin Black Powdercoated
Run up to 10-inch wide wheels

MSRP: $2,200

React Suspension

Interior Upgrades

 21. Instrument Bezel

Classic Parts of America price: $199.95

 22. Molded Plastic Dash Covers

LMC Truck price: $119.95 – $179.95

 23. TMI Complete Interior

TMI now offers high-value interior automotive components including complete seats with brackets, interior center consoles, carpet kits, all new door panels, even a new headliner. Currently in production for ’88-’94 Chevy C1500 standard cab trucks.

TMI Products

 24. Factory Replica Headliner

Classic Parts of America price: $244.95

 25. Shoulder Lap Belt

Classic Parts of America price: $299.95

 26. Door Panels (with or without power)

Classic Parts of America price: $399.95

 27. Front Door Arm Rest

Classic Parts of America price: $94.95

 28. Door Sill Plate (Suburban, rear, red)

Classic Parts of America price: $24.95

 29. Classic Dash Panel Insert

Classic Dash price: $129

 30. VHX Series

Dakota Digital price: $795

 31. Racing Seats

Corbeau Racing price: $349

TMI Products

Drivetrain Upgrades

 32. 383ci Stroker Motor

BluePrint Engines offers a direct replacement 383ci Stroker crate engine for ’88-’98 Chevy trucks. This is a small block GM style, fully dressed long block with carburetor. Aluminum heads and a roller cam are preinstalled and drop-in ready.

MSRP: $5,399

BluePrint Engines

 33. Telescopic Steel Steering Shaft

Borgeson steering shaft for full size Chevy and GMC trucks connects to the factory column and OEM steering box. It includes a complete rag joint and billet steel universal joint and weights 5.3 pounds.

MSRP: $248

Borgeson Universal Company

 34. 14-inch Front Big Brake Kit

This brake kit will work with any HD brake spindle, such as McGaughy’s, Street Edge, Belltech and even stock. You will receive a template and instructions for modifying your spindle, which requires cutting of the caliper ears and drilling and tapping for the caliper mounting bracket.

MSRP: $1,095

Pro Performance

 35. 13-inch Rear Big Brake Kit

Pro Performance offers this new brake kit for ’88-’98 Chevy trucks with factory rear ends and does not require machining to the axle or rotors. It uses new calipers, not rebuilt ones. It features laser-cut zinc plated caliper brackets and is designed to fit most 18-inch wheels and larger.

MSRP: $875

Pro Performance

 36. 5 or 6-Speed Pro Fit Transmission kits

These kits are designed to provide a 30-50% increase in fuel economy, a low RPM cruising for greatly reduced driver fatigue, an improved highway driving experience and reduced engine wear leading to longer engine life with cooler engine operating temperatures. 

American Powertrain

 37. Wilwood 14-inch Front Big Brake Kit

This 14-inch C1500 kit utilizes Wilwood 6-piston FNSL calipers, aluminum hubs, hats and machined 6061 AL brackets that bolt directly to the factory spindles or drop spindles without drilling. Designed to fit ’88-’00 full-size 2WD GM trucks and SUVs.

MSRP: $2,424

Little Shop Mfg.

LS SwapParts

 38. 2WD Engine Mount and Crossmember Kit

Works with both ½- and ¾-ton models. Includes motor mounts, frame brackets, transmission crossmember, transmission mount and hardware.

MSRP: $479

  39. 4WD Engine Mount and Frame Bracket kit

This 4WD mount kit locates the engine at the factory bell housing location so you can use your original transmission, transfer case and crossmember.

MSRP: $299

 40. Oil Pan Kits

These kits come standard or machined for the oil bypass valve to use with displacement on demand or variable valve timing. They include a new full-length windage tray, pickup tube, hardware, gasket, dipstick and a pickup tube girdle.

MSRP: $249

 41. Ceramic Coated Headers

These headers feature 3/8-inch laser cut flanges with the tubes welded inside and out and then machined. They include gaskets, bolts, reducers and O2 sensor bungs. Standard ceramic finish is polished silver; contact the company for bare steel and black ceramic coated pricing.

MSRP: $249

 42. LS Conversion Radiators

These radiators feature all-aluminum construction, stamped tanks with strengthening indentations, and a double pass design that put the inlet and outlet on the same side. The all-important steam port bung is welded into the upper part of the tank, which lets your new LS engine vent properly. They also include a sensor port that can be used for a coolant temp fan switch. 

MSRP: Starting at $619

BRP HotRods

 43. Wiring Harnesses and Computer

BRP HotRods offers stand-alone harnesses as well as harness and re-flashed computer packages.

BRP HotRods

 44. Direct-Fit GM LSx/Vortec Harness

Available for ’91-’07 Chevy/GMC Silverado/Sierra, Suburban and Tahoe, these true plug-and-play custom built harnesses are designed specifically for your project utilizing a ’94-’97 LT1/4 or ’97-up LSx or Vortec small block.

MSRP: $975

Current Performance Wiring

Body Parts

 45. Raised Steel Cowl Hood

Auto Metal Direct offers hoods for ’88-’98 Chevy GMC C/K pickup, ’92-’94 Blazer and Jimmy, ’95-’99 Tahoe and Yukon along with ’92-’99 Suburban. They’re all stamped from heavy gauge steel with factory style underside. 

MSRP: $279

Auto Metal Direct

 46. Door Window Channel and Beltline Seal Kit

This six-piece door window channel beltline kit includes the beltline moldings and glass run channels for each front door of the vehicle. 

MSRP: $250.99

Steele Rubber Products

 47. Reproduction Tailgate

NPD reproduction tailgates offer a ready-to-paint finish at an affordable price.

National Parts Depot price: $89.95

National Parts Depot

 48. Roll Pan with Tag Box

Lose the bumper and gain the sporty look we all love. AVS on the Web offers roll pans for OBS trucks with and without a tag box.

AVS on the Web price: $190

AVS on the Web

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