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.
1974 GMC MagnavanFACTORY OEM SERVICE PROCEDURE
Alternator Brush: Remove & Replace
| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| G3500, 32 Amp,37 Amp,42 Amp,55 Amp,61 Amp | 1.5 | B | ||
| 100 Amp,130 Amp | 1.5 | B | ||
| 105 Amp,145 Amp,62 Amp,85 Amp,75 Amp | 1.3 | B | ||
| Additional Procedure: ALTERNATOR BRUSH: Remove & Replace: | ||||
| Where Air Cond interferes add | 0.1 | B | ||
| Where Pwr Strg interferes add | 0.1 | B | ||
Factory Service Tools
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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.