This is a DIY Pictorial on installing a remote start with keyless entry system into a 1999 through 2002 Silverado. This pictorial specifically covers trucks with automatic transmissions and gasoline engines. The GMC full size Pickup ( Sierra ) will be the same for these years, too.
These trucks have the Passlock2 engine immobilizer system. There are many bypass modules available. Depending on your skill level and budget, you can use anything from "relays and resistor method " to the newer "data" style bypass modules. For this install, an iDatalink ADS TBSL PL bypass module was chosen. Due to the ease of access to the necessary wires, a "full function" bypass module was deemed un-necessary for this install.
Any quality remote start system can be used. This truck needs (+) Parking Light and (+) Door Lock outputs from the R/S system. While all R/S systems can provide (+) Parking Light output, most newer R/S systems only provide (-) door lock outputs, so either relays or a Directed 451M module is needed to make the (-) to (+) conversion.
For this install, an Avital 4103 remote start system and a Directed 451M door lock module was used. Below are the wire connections :
H1/1 LIGHT GREEN/ BLACK FACTORY ALARM DISARM Lt. Green (driver door key cylinder) (-) BCM, purple plug, pin B3
H1/2 GREEN / WHITE FACTORY REARM not used
H1/3 YELLOW (+) IGNITION OUT (TO ALARM) not used
H1/4 WHITE/ BLUE (-) ACTIVATION INPUT not used
H1/5 ORANGE (-) GROUND WHEN LOCKED not used
H1/6 BROWN (-) HORN OUTPUT Black (-) BCM, brown plug, pin A9
H1/7 RED / WHITE (-) TRUNK RELEASE OUTPUT not used
H1/8 BLACK GROUND Chassis Ground ( also has ADS TBSL PL Black wire )
H1/9 WHITE (+/-) LIGHT FLASH *** Set to (+) *** Brown (+) BCM, lt. blue plug, pin B6
H2/1 BLACK/ WHITE (-) NEUTRAL SAFETY SWITCH INPUT Chassis Ground ( auto trans only! )
H2/2 VIOLET/WHITE TACHOMETER INPUT WIRE White (ac) instrument cluster
H2/3 BROWN (+) BRAKE SWITCH SHUTDOWN WIRE White (+) brake switch
H2/4 GRAY (-) HOOD PINSWITCH SHUTDOWN WIRE to Avital kit supplied hood pin
H2/5 BLUE/WHITE (-) 200mA 2ND STATUS/DEFOG OUTPUT not used
4-pin satellite harness diagram
1 BLUE STATUS OUTPUT to ADS TBSL PL Blue/White @ 4 pin connector
2 ORANGE (-) ACCESSORY OUTPUT to extra Relay Pin 85
3 PURPLE (-) STARTER OUTPUT not used
4 PINK (-) IGNITION OUTPUT not used
Heavy gauge relay wiring diagram
1 PINK (+) (30 AMP) OUTPUT TO IGNITION CIRCUIT Pink (+) ignition harness ( also has ADS TBSL PL Pink wire )
2 PURPLE (+) (30 AMP) OUTPUT TO STARTER CIRCUIT Yellow (+) ignition harness
3 ORANGE (+) (30 AMP) OUTPUT TO ACCESSORY CIRCUIT Orange (+) ignition harness
4 RED (+) (30A) HIGH CURRENT 12 INPUT Red (+) ignition harness ( also has 451M Violet/Black wire )
5 PINK/WHITE (+) PROGRAMMED FOR IGNITION2 White (+) ignition harness
6 RED (+) (30A) HIGH CURRENT 12V INPUT RED / White (+) ignition harness ( also has ADS TBSL PL Red wire )
Door lock harness, 3-pin connector
1 BLUE (-) UNLOCK OUTPUT plug in Directed 451M connector
2 EMPTY NOT USED plug in Directed 451M connector
3 GREEN (-) LOCK OUTPUT plug in Directed 451M connector
Extra 30/40 Amp SPDT relay for Brown ACC2 wire :
Relay Pin 85 to Avital ORANGE (-) ACCESSORY OUTPUT
Relay Pin 86 and 87 to Silverado RED / White (+) ignition harness through 30 Amp fuse
Relay Pin 30 to Silverado Brown ACC2 wire @ ignition harness
Relay Pin 87a not used
ADS TBSL PL
4 Pin plug
Red to Avital heavy gauge RED / White wire
Black to Avital H1/8 Black wire
Blue/White to Avital BLUE (-) STATUS OUTPUT
9 Pin plug
Pink to Avital heavy Pink IGN1 wire
Orange to Silverado Violet wire @ OBD2 Pin 2
3 Pin plug to Avital Door Lock connector
Violet/Black w/15 Amp fuse to Avital Red wire ( which goes to Silverado Red @ ignition harness )
WHITE/ Black not used
BROWN / Black not used
GREEN/ Black to Silverado Lt. Blue (+) BCM, brown plug, pin A4
Blue/Black to Silverado White (+) BCM, brown plug, pin A3
A few notes : This truck had the Factory Alarm and power door locks, some don't. The wiring above reflects that. I chose to power the Brown ACC2 wire during remote start and therefore needed an additional high power output. The extra relay handled this additional ignition circuit. The ADS TBSL PL handled the Passlock2 bypass via its' lone connection to the Violet wire at Pin 2 of the OBD2 connector. Very easy, very reliable but more expensive than other methods. Because of this, I did not get a photo of the Passlock2 wires that are typically used with other bypass modules.
Set the tilt steering wheel to its' lowest position. Turn the ignition key to ON, press the brake pedal and move the gear selector to the bottom position. Remove the instrument cluster bezel by pulling it straight away from the dash. Remove the four 7mm screws that retain the instrument cluster and gently pull the cluster out. There is no need to disconnect the cluster harness, as there is plenty of slack in the harness. Lay the cluster on the dash. Move the shifter back to Park and remove the ignition key. Raise the tilt steering to it's highest position. Remove the two screws at the bottom corners of the lower dash panel, then
pull it straight away from the dash.
Remove the four 10mm nuts shown using a deep socket and then remove the metal plate.
At this point the BCM and ignition wires are accessible. No need to remove the steering column covers.
This is a picture of the main ignition wires as they leave the left side of the steering column and pass above the BCM.
This is a close-up photo of the +12V constant wires :
This is a shot of the BCM with the necessary wire marked :
This is a close-up of the Horn wire at the BCM :
This is a close-up of the Parking Light wire ( and Horn ) at the BCM :
If your truck has the Factory Alarm, here is a photo of the Disarm wire :
These are pictures of the Bake wire :
This is a photo of the Tach wire ( instrument cluster removed and resting on dash ) :
Here is a picture of another Tach source, any Fuel Injector :
Here is a picture of the OBD2 connector and the Violet Data wire at Pin 2 :
Firewall pass-through is available at the main wiring harness grommet and exits behind the vacuum brake reservoir.
While this Pictorial shows the necessary wires, you should still locate and verify these connection points with a Digital Multi Meter before soldering on the R/S's wires.
The parts used for this install ( Avital 4103 = $50, ADS TBSL PL= $40, 30/40 Amp SPDT Relay w/harness = $4, inline ATC fuseholder with 30 Amp fuse = $3 & DEI 451M = $9 ) cost around $106. This is probably less that getting a replacement factory keyless entry FOB with programming from the dealer.Soldering is fun!