Part #: 7287-9N

WAI 7287-9N Alternator

110 vehicles fit this part
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Fitment: Chevrolet and GMC, C10, C10 Suburban, C1500, C1500 Suburban, C20, C20 Suburban, C2500, C2500 Suburban, C30, C3500, Jimmy, K10, K10 Suburban, K1500, K1500 Suburban, K20, K20 Suburban, K2500, K2500 Suburban, K30, K3500, K5 Blazer, P20, P2500, P30, and P3500
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120-Amp Alternator for Delco Applications

The WAI 7287-9N is a 120-amp alternator built for older Chevrolet and GMC truck and SUV platforms that need dependable charging output. It is a 100% new unit, not remanufactured, and uses proprietary components and manufacturing processes to support long service life and consistent electrical performance.

Key Features

  • 120-amp amperage rating for higher electrical demand
  • 100% new alternator construction
  • Internal regulator type
  • External fan design
  • Clockwise (right) rotation
  • Includes pulley
  • 1-groove V-belt pulley
  • Delco family application

Detailed Product Overview

Built for charging-system service on classic GM platforms, this WAI alternator is specified for 12-volt electrical systems and uses an internal regulator for simplified operation. The Delco-style design, external fan, and included V-belt pulley make it a direct-match solution for vehicles that require a 120-amp output with clockwise rotation. The 7287-9N part number is a useful reference when verifying the correct charging component for Chevrolet C10, K10, K20, K30, K5 Blazer, P20, P30, and GMC C1500, K1500, K2500, K3500, Jimmy, P2500, and P3500 applications.

This part cross-references BBB Industries 7287-9 and 7290-9 for the same application.

Vehicle Fitment

  • Fits 1985-1990 Chevrolet P30, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1985-1990 GMC P3500, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1985-1989 Chevrolet P20, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1985-1989 GMC P2500, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet C10, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet C10 Suburban, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet C20, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet C20 Suburban, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet C30, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet K10, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet K10 Suburban, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet K20, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet K20 Suburban, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet K30, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 Chevrolet K5 Blazer, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC C1500, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC C1500 Suburban, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC C2500, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC C2500 Suburban, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC C3500, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC Jimmy, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC K1500, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC K1500 Suburban, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC K2500, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC K2500 Suburban, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
  • Fits 1983-1986 GMC K3500, N/A; Opt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp

Common Charging-System Issues

  • Low battery charging output on Chevrolet C10, K10, and GMC C1500 applications
  • Dim lights or unstable electrical performance under load
  • Alternator failure on 12-volt Delco-style charging systems
  • Worn or incorrect alternator replacement on 1983-1990 GM truck and SUV platforms
  • Charging concerns on vehicles using a 1-groove V-belt setup

Installation Notes and Tips

Verify the plug position, pulley style, rotation direction, and amperage rating before installation. This alternator is specified for 9:00 plug position applications and clockwise rotation, so matching the original configuration is important for proper fitment. Confirm belt alignment and inspect the charging circuit, battery condition, and wiring connections during replacement.

Quality Assurance

WAI builds this alternator as a new unit using proprietary components and processes to support durability and performance in daily service. The 7287-9N is engineered for the amp output required by today’s electrical loads while maintaining the Delco-style fitment needed for the listed Chevrolet and GMC applications.

BrandWAI
Part Number7287-9N
1212
Fan TypeExternal
Rotation DirectionClockwise (right)
Pulley IncludedYes
FamilyDelco
Pulley Groove Quantity1
Pulley Belt TypeV-belt
Regulator TypeInternal
Decoupled Or Clutch PulleyNo
Amperage Rating120

This part fits 110 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1990ChevroletP306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1990GMCP35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1989ChevroletP206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1989ChevroletP306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1989GMCP25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1989GMCP35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1988ChevroletP206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1988ChevroletP306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1988GMCP25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1988GMCP35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1987ChevroletP206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1987ChevroletP306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1987GMCP25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1987GMCP35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletC106.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletC10 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletC206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletC20 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletC306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletK106.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletK10 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletK206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletK20 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletK306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletK5 Blazer6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletP206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986ChevroletP306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCC15006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCC1500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCC25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCC2500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCC35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCJimmy6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCK15006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCK1500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCK25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCK2500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCK35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCP25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1986GMCP35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletC106.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletC10 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletC206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletC20 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletC306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletK106.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletK10 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletK206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletK20 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletK306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletK5 Blazer6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletP206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985ChevroletP306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCC15006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCC1500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCC25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCC2500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCC35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCJimmy6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCK15006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCK1500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCK25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCK2500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCK35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCP25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1985GMCP35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletC106.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletC10 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletC206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletC20 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletC306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletK106.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletK10 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletK206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletK20 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletK306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984ChevroletK5 Blazer6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCC15006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCC1500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCC25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCC2500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCC35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCJimmy6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCK15006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCK1500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCK25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCK2500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1984GMCK35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletC106.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletC10 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletC206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletC20 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletC306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletK106.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletK10 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletK206.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletK20 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletK306.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983ChevroletK5 Blazer6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCC15006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCC1500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCC25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCC2500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCC35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCJimmy6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCK15006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCK1500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCK25006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCK2500 Suburban6.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp
1983GMCK35006.2LV8N/AOpt. HD, 108 to 120 Amp, 9:00 Plug Position, Supplied as 120 Amp

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

110123611012521101290110536611055707287-97290-9

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.