Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1990 Chevrolet Blazer 5.7 K, StandardFACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Switches
SWITCHES LOCATION
| Component | Location |
|---|---|
| A/C Pressure Cycling Switch | On accumulator. See Figure . |
| Brake/Stoplight Switch | On brake pedal support bracket. |
| Brake Warning Switch | In hydraulic brake combination valve. |
| Clutch Switch (Cruise) | On clutch pedal bracket. |
| Fast/Cold Idle Switch (6.2L) | On right rear of engine. |
| Glow Plug Inhibit Switch | In water crossover near front of engine. |
| Restriction Switch (Diesel) | On fuel filter assembly. |
| TCC Governor Pressure Switch | In transmission. |
| Throttle Position Switch (6.2L) | On fuel injection pump. |
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.
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 QuoteNo obligation. See pricing before you book.