I think the official article found here is pretty explanatory, but I figured I would post a step-by-step guide to changing Envoy headlights because there are no pictures specifically for the Envoys, and some of us (myself included) need to know how to change our headlights. Through pictures, I will show how to change the lo-beam lights on my 2002 Envoy.
Tools Required: Fingers
Parts Needed: 9006 (low-beam) or 9005 (high-beam) headlight/headlamp
Double check exactly which bulbs you need for your particular vehicle!
Difficulty: Very Easy
Estimated Time: 4-5 minutes per headlight, or 10 minutes while holding a camera in one hand
Cost: $49.99 for (2) Sylvania SilverStar "Ultra" High-Performance Halogen Headlights (better prices might exist elsewhere, I just wanted mine immediately so I paid full price)
Installation:
1) Lift sliding tabs up to free the headlight housing
2) Pull housing forward
3) Remove rubber cap
4) Lift clip and move plug away from the bulb
5) Turn headlight base 90 degrees counter-clockwise and remove
6) Holding new headlight (by the base only!) insert bulb
7) Turn new headlight base 90 degrees clockwise until it feels firmly in place
8) Re-attach wire plug (slightly tricky if you have big fingers) until it clicks
9) Replace rubber cap over the hole
10) Briefly turn on headlights, check that the bulbs work, turn off headlights
11) Push housing back into place
12) Push sliding tabs down to secure the headlight housing
Steps 1 - 3:
Tools Required: Fingers
Parts Needed: 9006 (low-beam) or 9005 (high-beam) headlight/headlamp
Double check exactly which bulbs you need for your particular vehicle!
Difficulty: Very Easy
Estimated Time: 4-5 minutes per headlight, or 10 minutes while holding a camera in one hand
Cost: $49.99 for (2) Sylvania SilverStar "Ultra" High-Performance Halogen Headlights (better prices might exist elsewhere, I just wanted mine immediately so I paid full price)
Installation:
1) Lift sliding tabs up to free the headlight housing
2) Pull housing forward
3) Remove rubber cap
4) Lift clip and move plug away from the bulb
5) Turn headlight base 90 degrees counter-clockwise and remove
6) Holding new headlight (by the base only!) insert bulb
7) Turn new headlight base 90 degrees clockwise until it feels firmly in place
8) Re-attach wire plug (slightly tricky if you have big fingers) until it clicks
9) Replace rubber cap over the hole
10) Briefly turn on headlights, check that the bulbs work, turn off headlights
11) Push housing back into place
12) Push sliding tabs down to secure the headlight housing
Steps 1 - 3: