electrical

Power Window Regulator - Rear

for 1966 Chevrolet Corvette 327ci V8 · RWD

Difficulty

Moderate

Time

2.2 h

Tools

Steps

Replace the rear window regulator mechanism in a 1966 Corvette coupe to restore proper power window operation.

Warnings

⚠The window glass is heavy and can drop suddenly if not properly supported. Use a C-clamp or wedge to secure it before disconnecting the regulator.

⚠Original regulators may be riveted in place. Drilling out rivets creates sharp edges and metal shavings - wear gloves and protect interior surfaces.

ℹ️The 1966 Corvette uses a unique door construction with limited access. Work carefully to avoid damaging the fiberglass body or interior trim.

Tools required

Phillips screwdriverEssential

Flat blade screwdriverEssential

Door panel trim tool setEssential

10mm socket and ratchetEssential

1/4 inch socket and ratchetEssential

Needle-nose pliersEssential

Masking tape

Power drill with punch bit

Rivet gun (if installing rivet-style regulator)

C-clamp or window wedgeEssential

Shop light or flashlightEssential

Parts

Rear window regulator assembly × 1 — Use OEM specification or aftermarket equivalent for 1966 Corvette
Window regulator mounting rivets or bolts × 1 — Depends on regulator style - original uses rivets
Door panel retaining clips × 1 — Replace any damaged clips

Preparation

Disconnect negative battery cable to prevent accidental window motor operation during service.
Roll rear window to approximately mid-travel position for easiest access to regulator bolts.
Protect interior door sill and surrounding areas with towels or blankets.
Have replacement regulator and all fasteners ready before beginning disassembly.

Procedure

1
Remove door panel trim
If equipped with a manual crank handle, remove it by prying out the spring clip; however on a power window equipped door there is no crank handle—instead remove the power window switch plate as required. Remove the armrest by taking out the 2 Phillips screws. Remove the door handle escutcheon by taking out its single screw. Carefully pry the door panel away from the door frame starting at the bottom using trim tools, releasing the retaining clips around the perimeter (verify exact clip count against 1966 Corvette service documentation).
2
Remove watershield access
Peel back the plastic watershield (if equipped) from the door cavity to expose the window regulator mechanism and mounting points. On 1966 Corvettes, you may need to remove it completely or cut an access opening. Tape edges to prevent tearing.
3
Disconnect window motor
Locate the power window motor connector inside the door cavity. Disconnect the electrical connector by pressing the release tab and pulling straight out. Verify battery is disconnected to prevent accidental activation.
4
Secure window glass
Raise or lower the window to a position where you can access both window-to-regulator attachment bolts through the access holes in the door frame. Once positioned, secure the glass in place using a C-clamp across the top of the door frame or wedge blocks to prevent it from dropping when disconnected.
5
Disconnect glass from regulator
Through the door access holes, locate the 2 bolts securing the window glass to the regulator lift arms. These are typically SAE (imperial) bolts with lock washers; verify exact size against 1966 Corvette service documentation. Remove both bolts and carefully lift the glass free from the regulator channels. Support the glass in the raised position with additional wedges or tape.
6
Remove regulator mounting fasteners
Locate the mounting points securing the regulator assembly to the inner door frame (verify exact count against 1966 Corvette service documentation). Original equipment uses rivets which must be drilled out using a 1/4 inch drill bit - drill only through the rivet head, not into the door frame. Aftermarket regulators may use bolts. Remove all 4 fasteners completely.
7
Extract regulator assembly
With all mounting fasteners removed, carefully manipulate the regulator assembly to angle it through the large access opening in the door frame. The scissor mechanism and motor assembly must be collapsed and rotated to fit through the opening. Work slowly to avoid damaging the steel inner door frame or the fiberglass body skin.
8
Prepare new regulator
Compare the new regulator to the old unit to verify correct application. If installing a bolt-on style regulator where rivets were original, ensure mounting holes align properly. Lubricate all pivot points and slide channels on the new regulator with white lithium grease.
9
Install new regulator
Angle the new regulator assembly through the door access opening and position it so all 4 mounting holes align with the door frame mounting points. Install bolt-style mounting hardware finger-tight only at this stage using 1/4 inch bolts with lock washers; if using rivets, do not set them until after window operation is verified in the testing step.
10
Connect window motor
Reconnect the electrical connector to the power window motor. Ensure the connector clicks fully into place and is secure. Route wiring away from moving regulator components.
11
Attach glass to regulator
Remove the window support clamps or wedges. Lower the window glass into the door frame and align the glass mounting brackets with the regulator lift arm attachment points. Thread the 2 mounting bolts through the access holes and tighten securely. Do not overtighten as this can crack the glass mounting brackets.
12
Test window operation
Reconnect the negative battery cable temporarily. Test window operation through full up and down travel multiple times. Listen for binding, unusual noise, or hesitation. Verify smooth operation and proper window alignment in the frame at full up position.
13
Final regulator mounting
With window operation verified, disconnect battery again. Fully tighten all 4 regulator mounting fasteners. If using rivets, compress them fully with the rivet gun. If using bolts, tighten securely but do not over-torque into the door frame.
14
Reinstall watershield and door panel
Reposition the plastic watershield over the door cavity, ensuring good adhesion around all edges. Align the door panel with the door frame and press firmly to engage all 8 retaining clips. Reinstall the door handle escutcheon screw, armrest screws, and the power window switch plate.

Reassembly

Reconnect negative battery cable and perform final window operation test.
Verify all door panel trim pieces are secure and aligned properly.
Check window alignment and adjust door glass stops if necessary to prevent binding.

Verification

Operate window through full travel in both directions at least 5 times to ensure smooth operation.
Verify window seats properly in the up position with no gaps or misalignment.
Check that window stops at correct positions and does not over-travel.
Listen for any unusual grinding, clicking, or binding noises during operation.
Confirm door panel is secure with no rattles or loose clips.