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1990, 1989, 1988 GMC S15 Hummer Starter Motor
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1988 - 1990 GMC S15 Hummer Starter Motor (Proform) NEW

$ 191 .30
120-DayReturns
LifetimeWarranty
100%Money-Back

Product Notes Read before buying

High-Torque Starter; Stagger Bolt; Compression Ratio:10 : 1; Finish:Silver/Black; Flywheel Tooth Number:168-Tooth; Gear Reduction Ratio:3.75:1; Material:Aluminum/Steel; Mounting Plate:Staggered Bolt Mounting Plate; Power Output:1.7 Kilo Watts

High-torque, gear-reduction design. 100% NEW, not rebuilt. Offset design results in more clearance between the oil pan and the starter, and can be rotated for additional chassis clearance. The high-torque, high-output motor spins the engine over faster than stock starters, delivering 40-50% more cranking power. 3.75-to-1 sealed gear-reduction drive and full ball bearing construction. Includes shims to set pinion-gear engagement (when necessary). Approved by all leading sanctioning organizations.
Brand: Proform
Condition: New
See Other GMC S15 Starter Motors
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Specifications & Info


Attribute Value
Applications Chevy Small Block Engines And Chevy Big Block Engines
Category Starters
Compression Ratio 10 : 1
Feature/Benefit High-torque, Gear-reduction Design.
Finish Silver/black
Flywheel Tooth Number 168-tooth
Gear Reduction Ratio 3.75:1
Make Chevrolet
Material Aluminum/steel
Mounting Plate Staggered Bolt Mounting Plate
Power Output 1.7 Kilo Watts
Rotation Standard
Weight 8.3 Lbs.

Vehicle Fitment Guide

This part fits the following vehicles:

GMC 1 model (tapclick to expand)(tapclick to hide)
S15 1988-1990 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Cab & Chassis 1988 L4 2.5L RWD/4WD Automatic & Manual
Base Cab & Chassis 1988 V6 2.8L RWD/4WD Automatic & Manual
Base Cab & Chassis 1988 V6 4.3L RWD/4WD Automatic & Manual
Base Extended Cab Pickup 1988 - 1990 L4 2.5L RWD/4WD Automatic & Manual
Base Extended Cab Pickup 1988 - 1990 V6 2.8L RWD/4WD Automatic & Manual
Base Extended Cab Pickup 1988 - 1990 V6 4.3L RWD/4WD Automatic & Manual
Base Standard Cab Pickup 1988 - 1990 L4 2.5L RWD/4WD Automatic & Manual
Base Standard Cab Pickup 1988 - 1990 V6 2.8L RWD/4WD Automatic & Manual
Base Standard Cab Pickup 1988 - 1990 V6 4.3L RWD/4WD Automatic & Manual
Gypsy Extended Cab Pickup 1988 L4 2.5L RWD/4WD Automatic & Manual
Gypsy Extended Cab Pickup 1988 V6 2.8L RWD/4WD Automatic & Manual
Gypsy Extended Cab Pickup 1988 V6 4.3L RWD/4WD Automatic & Manual
Gypsy Standard Cab Pickup 1988 L4 2.5L RWD/4WD Automatic & Manual
Gypsy Standard Cab Pickup 1988 V6 2.8L RWD/4WD Automatic & Manual
Gypsy Standard Cab Pickup 1988 V6 4.3L RWD/4WD Automatic & Manual
High Sierra Extended Cab Pickup 1988 - 1990 L4 2.5L RWD/4WD Automatic & Manual
High Sierra Extended Cab Pickup 1988 - 1990 V6 2.8L RWD/4WD Automatic & Manual
High Sierra Extended Cab Pickup 1988 - 1990 V6 4.3L RWD/4WD Automatic & Manual
High Sierra Standard Cab Pickup 1988 - 1990 L4 2.5L RWD/4WD Automatic & Manual
High Sierra Standard Cab Pickup 1988 - 1990 V6 2.8L RWD/4WD Automatic & Manual
High Sierra Standard Cab Pickup 1988 - 1990 V6 4.3L RWD/4WD Automatic & Manual
Sierra Classic Extended Cab Pickup 1988 - 1990 L4 2.5L RWD/4WD Automatic & Manual
Sierra Classic Extended Cab Pickup 1988 - 1990 V6 2.8L RWD/4WD Automatic & Manual
Sierra Classic Extended Cab Pickup 1988 - 1990 V6 4.3L RWD/4WD Automatic & Manual
Sierra Classic Standard Cab Pickup 1988 - 1990 L4 2.5L RWD/4WD Automatic & Manual
Sierra Classic Standard Cab Pickup 1988 - 1990 V6 2.8L RWD/4WD Automatic & Manual
Sierra Classic Standard Cab Pickup 1988 - 1990 V6 4.3L RWD/4WD Automatic & Manual
Verify before ordering — please confirm your vehicle's year, make, model and sub-model specifications before placing your order. If anything is unclear, our customer service team is available to help.

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Shipping Information

We offer fast, reliable shipping on all orders:

  • Ships to all countries via US Postal Service Priority Mail.
  • Most orders ship within 1 business day.
  • Delivery time: 1-4 business days after shipment.
  • International shipping available, including APO/FPO addresses.
  • Tracking information provided for all shipments.
  • Additional handling fees may apply for oversized/overweight packages.

Lifetime Warranty

This part comes with a limited lifetime warranty. Warranty begins on the original purchase date.

Warranty does NOT cover:

  • Shipping costs or labor expenses.
  • Installation errors.
  • Parts used for racing.
  • Commercial vehicle parts.

Returns (120 Days)

We want you to be 100% satisfied with your purchase. That's why we offer:

  • 120-Day Returns - Return any part within 120 days from date of receipt.
  • Must obtain RMA (Return Merchandise Authorization) number before returning.
  • Parts must be in original condition, uninstalled, unaltered, and in original packaging.
  • Important: Electrical parts are not returnable if unsealed.
  • Please inspect parts upon arrival and notify us within 5 days of receiving incorrect or damaged parts.
  • Refunds processed after warehouse receives return and credited to original payment method.
High-torque, gear-reduction design. 100% NEW, not rebuilt. Offset design results in more clearance between the oil pan and the starter, and can be rotated for additional chassis clearance. The high-torque, high-output motor spins the engine over faster than stock starters, delivering 40-50% more cranking power. 3.75-to-1 sealed gear-reduction drive and full ball bearing construction. Includes shims to set pinion-gear engagement (when necessary). Approved by all leading sanctioning organizations.

Fits Years: 1988 1989 1990

Fits Models: S15

Expert Guides

GMC S15 Starter Motor Guide: Choosing the Right Replacement for 1982-1990

Everything you need to know before buying a new starter for your 1982-1990 GMC S15.

 Read Full Guide →

Related Trouble Codes (OBD-II)

1 matching guide

If your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.

↑ A single part can trigger multiple related trouble codes. Each guide is vehicle- and code-specific.
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