2003 Hummer H2FACTORY OEM SERVICE PROCEDURE

Electrical Component Locator: Grounds

GROUNDS LOCATION

Component Location
G100 On left front frame body mount.
G102 At left front side of engine block.
G103 At top right rear of engine. See Figure .
G104 At top left rear of engine. See Figure .
G106 At right rear of engine compartment, on forward dash panel.
G200 On left side of dash, near left kick panel.
G203 At lower right side of dash, near right kick panel.
G300 On left side body mount, in front of driver door. See Figure .
G302 At left inner center "B" pillar.
G304 Under passenger seat.
G306 At right inner center "B" pillar.
G308 At right frame body mount, near right rear door.
G401 At left rear frame body mount.
G402 Attached to front of air suspension mounting bracket.
G405 At right rear frame body mount.
G410 On right rear inner side body panel.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.