For 1990-2009 cars

# TWILIGHT SENTINEL & THEFT DETERRENT OPER. DIFFERENCES

#### SUBJECT: TWILIGHT SENTINEL AND THEFT DETERRENT OPERATION DIFFERENCES (REPLACE THE-TWILIGHT SENTINEL MODULE)

#### VEHICLES AFFECTED: 1990-92 "C AND D" MODELS

THIS BULLETIN SUPERSEDES AND REPLACES CORPORATE BULLETIN REFERENCE NUMBER 019007R** WHICH SHOULD BE DISCARDED.

Some 1990-1992 Cadillac DeVilles, Fleetwoods, and Broughams with option code T82 may exhibit one of the following conditions:

1. With the twilight switch on or off, in dark ambient conditions. key off:

A. When the park lamps only are turned on, the headlamps will turn on for the delay set by the twilight control switch then turn off. With the twilight switch off, the headlamps turn on for the minimum delay when the park lamps are turned on.

B. When the theft deterrent is activated, the headlamps will turn on. The headlamps and park lamps will not flash. The horns will sound on and off normally.

2. With the twilight sentinel enabled in dark ambient conditions, when the ignition is turned off, the headlamps will turn off when either the driver's door is opened or the brake pedal is depressed. The twilight delay is canceled and the headlamps appear to time out early.

3. The lights cycle on and off at dusk or on overcast days when set in twilight mode.

4. The lights will turn off only at high light intensity levels.

Complaint: Lights remain on too long as morning light increases after dawn.

5. The lights time out in less than 90 seconds after key off when the delay switch is set at maximum delay. Service modules marked with a black X on the lower left hand corner of the yellow (red for Canadian) label have incorporated changes to ensure a 90 second delay time. These modules must be used to repair this condition.

To repair any or all of these conditions, replace the twilight sentinel module with GM Service P/N 16518842 for U.S. vehicles and P/N 16518845 for Canadian vehicles. Refer to Service Information Manual, Section 9C, for replacement procedure.

#### WARRANTY INFORMATION:

VEHICLE SERIES

Operation Description Operation Number C D

1990 R4220 0.9 hr. 0.3 hr. 1991-1992 R4220 0.8 hr. 0.3 hr.

"BULLETIN REFERENCES: Corporate Ret. 019007R

General Motors of Canada 90-8-162

Cadillac Division T-90-72

1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

SUB. VEHICLE AFFECT COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U

CATEGORY - 10 "BODY SEC.

Service Procedures 1988-92 A, F, H, 93-10-100* x 12/15/92 For Identification L, N, W Models and And Repair Of Paint 1988-92 C/K, R/V, Colour coat Delamination S/T, M/L and G Light From Elpo Primer Duty Trucks

Information On 1993 "V" Models 93-10-101 x 10/31/92 Modified Window (Cadillac Allante) Adjustment Procedure

Wiring Harness Rubs 1992 "Y" Model (Chev. 93-10-102 x 10/31/92 Against Folded Corvette) Convert. Convertible Top After Vin #110212 (Re-Route Wiring Harness)

Information On Bypassing 1992-93 "N" Models 93-10-103* x 12/31/92 Inoperative Fuel Door Release Mechanism

Seat Belt Restraint 1990-92 "W" Model 93-10-104*#x 10/31/92 Solenoids Remain On Sedans (Chevrolet, (Diagnosis And Repair Oldsmobile And Procedure) Buick)

Illuminated Entry 1990-92 "W" Models 93-10-105*#x 10/31/92 Lights, Seat Belt (Pontiac) Restraint Solenoids, Door Ajar Mass. All Stay On(Diagnosis/Repair)

Information On Changes 1992 "E/K" Models 93-10-106 x 10/31/92 To Hood And Strut

Water Leak In Trunk Area 1992 "B" Model 93-10-107 x 10/31/92 (Install Strip Caulk around Bezel Mounting Studs)

Loose Mirror Remote 1992 "N" Models 93-10-108 x 10/31/92 Control Assembly (Replace Front Side Upper Door Trim)

Information On Engine 1991-92 "Y" Model 93-10-109 x 11/14/92 Paint Availability With 6.7L Engine (Silver Gray) (Vin J, Rpo LT5)

*REVISED BULLETINS-Please Destroy Previous Bulletin #PUBLISHED ONLY for General Motors of Canada Dealers PSB (PRODUCT SERVICE BULLETIN) SMU (SERVICE MANUAL UPDATE)

1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

SUB. VEHICLES AFFECT COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U

CATEGORY-10" BODY SECTION" (continued)

Deck Lid Release 1992 "N" Models 93-10-110 x 11/14/92 Handle High Efforts (Replace Deck Lid Release Cable)

Door Trim Pad Rattle 1992-93 "E and K" 93-10-111* x 11/30/92 (Diagnose/Replace Clips, Models Inspect Screws Wrap Foam Tape Around Door Hook/Belt Line Clips)

Headliner Has Fishy Odor 1992 "B" Model 93-10-112* x 12/31/92 (Replace Headliner) Sedans

Itch Noise From 1986-92 "S/T" Utility 93-10-113 x 11/30/92 Windshield Pillar Area Trucks (Diagnose/Install Felt Tape)

Windshield Cowl Area 1991-92 "C" Models 93-10-114* x 1/30/93 Wind Noise (Insert Strip Of 318 Inch Closed Coil Foam)

Service Procedures - Tri 1987-93 "V", 1988-93 "K" 93-10-115* X 12/15/92 Coat Paint Repair and 1989-93 "E"

Lid Does Not Latch Properly 1992 "B" Model 93-10-116 x 12/15/92 (Add Reinforcement Plate) with Rpo A91

Front Door Wind Noise 1988-92 "C/K" Trucks 93-10-117 x 12/15/92 (Diagnose/Install Redesigned Parts As Indicated)

Rear Fascia Lower Edge 1992-93 "H" Models (Buick) 93-10-118 x 12/15/92 Wavy (New Moulding Kit)

Procedures On Scuff/Scratch 1981-1993 Models With 93-10-119* x 12/15/92 Removal From Aluminum Wheels Clear Coat On Aluminum Wheels

*REVISED BULLETINS-Please Destroy Previous Bulletin #PUBLISHED ONLY for General Motors of Canada Dealers PSB (PRODUCT SERVICE BULLETIN) SMU (SERVICE MANUAL UPDATE)

1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

SUB. VEHICLES AFFECT COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U

CATEGORY - 10 "BODY SECTION" (continued)

Door Hinge Replacements 1989-1992 "L and 93-10-120 x 12/15/92 (New Policies, Procedures W" Models And Labour Allowances)

Roof Luggage Rack Wind Noise 1992 "C/K" 93-10-121 x 12/31/92 (Redesigned Cross Rails) Suburbans And Utilities

Information On Glass Back 1992 1/2 "J" Model 93-10-122 x 12/31/92 Window Assembly Convertible Replacement (Procedure And Parts)

High Rear Compartment 1992 "N" Models 93-10-123 x 12/31/92 Closing Efforts (Adjust Lock Assembly And/Or Replace Weatherstrip)

Roof Panel Attaching Bolt 1986-92 "Y" Model 93-10-124 x 12/31/92 Rattles (Install New Retainer/Silencer/Bolt)

Rear Compartment Water 1992 "B" Model 93-10-125 x 12/31/92 Leak Corrections

Front Side Door Armrest 1992-93 "N" Model 93-10-126 x 12/31/92 Moulding Retention (Apply Adhesive)

Driver's Door Windnoise 1990-92 "E" Model 93-10-127 x 12/31/92 (Reinstall The Run Channel Retainer)

Centre Pillar Trim Assembly 1992 "K" Model 93-10-128 x 12/31/92 Warping (Install New Centre Pillar Trim With Reinforced Forward Edge)

Popping Or Creaking Noise From 1993 "W" Model 93-10-129 x 1/15/93 Instrument Panel (Reposition Nut, Tighten And Retorque Bolt)

*REVISED BULLETINS - Please Destroy Previous Bulletin #PUBLISHED ONLY for General Motors Of Canada Dealers PSB (PRODUCT SERVICE BULLETIN) SMU (SERVICE MANUAL UPDATE)

1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

SUB. VEHICLES AFFECT COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U

CATEGORY - 10 "BODY SECTION" (continued)

Information On Seat Trim 1993 "A" Model 93-10-130 x 1/15/93 Covers That Can Not Be Matched With Service Parts

Cosmetic Rust At Side Door 1993 "D" Model 93-10-131 x 1/15/93 Window Belt Reveal Moulding (Apply Solution)

Windnoise (Informational) 1991-92 "B" Model 93-10-132 x 1/15/93

Column Mounted Gear Shift 1992 "C/H" Models 93-10-133 x 1/15/93 Lever Too Short (Install New Design Shift Lever)

Paint Damage To Aero 1989-93 "W" Coupes 93-10-134 x 1/15/93 Mouldings With B4U Option (Prepare/Apply Shields)

Dutch Door Water Entry 1992-93 "M/L" Vans 93-10-135 x 1/15/93 (Service Procedures) With Rpo E54

Incorrect WA Number For 1993 "Y" Model 93-10-136 x 1/15/93 Codes 68 (Ruby Red) Paint

Hard To Reach Front 1993 "N" Model Coupes 93-10-137 x 1/15/93 Passenger Buckle Side Seat Belt (Install New Seat Belt Retainer Bracket)

Dome And Reading Lamp 1990-92 "J" Models 93-10-138 x 1/15/93 Assembly Loose (Replace Assembly)

Front Seat Shoulder Belt 1991-92 "A" Model 93-10-139 x 1/15/93 Comfort (Replace Retractor And Belt)

*REVISED BULLETINS - Please Destroy Previous Bulletin #PUBLISHED ONLY for General Motors Of Canada Dealers PSB (PRODUCT SERVICE MANUAL) SMU (SERVICE MANUAL UPDATE)

1993 INDEX "PRODUCT SERVICE BULLETIN" and "SERVICE MANUAL UPDATE" Issue Date: FEB. 15/93

SUB. VEHICLES AFFECTED COMPONENT CATEGORY P S DATE AFFECTED and S M NUMBER B U

CATEGORY - 10 "BODY SECTION" (continued)

Sliding Door Effort 1985-93 "M/L" Vans 93-10-140 x 2/15/93 (Repair Procedures)

Information And 1993 "W" Model 93-10-141 x 2/15/93 Identification - Special Tail Lamp Lenses/Assemblies

Increased Movement Of 1992 "N" Models 93-10-142 x 2/15/93 Driver 4-Way Seat Adjuster (Replace Seat Adjuster And Related Hardware)

SMU - Section 10-Front Door 1992-93 "H" Models 93-10-600 X 12/31/92 Trim Panel Disassembly And Assembly New Service Procedure

Service Manual Update - 1993 "N" Models 93-10-601 x 12/31/92 Section 10-5 Body Front End Hood Removal Without Breaking Mig Welds

Service Manual Update - 1985-93 "M/L" Vans 93-10-602 x 1/30/93 Section 10A1 - Sliding Door Diagnosis

SMU - Section 10-9 - 1992 "C,H" Models 93-10-603 x 1/30/93 Torque Rod Removal Installation And Hinge Spring Adjustments - New Service Procedure

SMU-Section 10-Doors/ 1991-93 "C" And 93-10-604 x 1/30/93 Locks/Windows 1992-93 "H" Models Service Procedures (Revised)

*REVISED BULLETINS - Please Destroy Previous Bulletin #PUBLISHED ONLY for General Motors Of Canada Dealers PSB (PRODUCT SERVICE MANUAL) SMU (SERVICE MANUAL UPDATE)

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.