Fuse block with fuel pump and fan relays

LS Series Stand Alone Engine Wiring Harnesses

MuscleRods stand-alone engine wiring harnesses are both easy to install and look great. MR harnesses are built with high-quality wire, OEM connectors and feature a high-tech woven covering that protects the wires from heat and abrasion. Harnesses are designed to ensure correct fuel injector connectors are in place for specific applications, but if injectors are changed plug in adapters are available to match your needs.

 

All of our Gen 3 harnesses are designed to use the 5-pin MAF (Mass Air Flow sensor). This MAF offers better performance and has the IAT (Intake Air Temp sensor) built in for a cleaner installation. When swapping an LS into an earlier vehicle the DBW (Drive by Wire) electronic throttle body can complicate the installation since it requires making a custom bracket that is affixed to the firewall. For this reason our Gen 3 Harnesses are built to use a mechanical throttle body. MR conversion harnesses delete non-essential emissions-related sensors such as secondary O2 sensors, EVAP solenoid and EGR.

 

MR harnesses are designed to be used with your existing ECM/PCM if your application had a cable throttle body. If you are converting from a DBW throttle body you will need to get the appropriate PCM, the instructions tell you which PCM you need and includes a list of programmers that can help you get the PCM tuned to match your application. The detailed instructions are easy to understand and make installation a snap.

 

OEM weather pack connectors and woven nylon covering.

The harness kits are separated into groups, Gen 3 with 24 tooth reluctor ring, Gen 4 converting to Cable throttle body with Gen 3 PCM, and Gen 4 with 58 tooth reluctor ring. Then grouped by car or truck engine. To help identify what reluctor ring you have see our Reluctor Ring Identification at the bottom of this page.

Includes 4 foot trunk and firewall grommet for under dash install option.

Gen 3 (24x) Car Engine Stand-Alone Harnesses

These harnesses kits include the main harness and any adapters needed for your application. They are made to work with a cable throttle body (Either OE or converting), 12200411 or 93544896 PCMs, MR Part #997-9200-10 MAF Sensor, and MR Part #997-9101-00 O2 Sensors.

 

997-5001-56      1998-2002 F-Body Engine T-56 Trans (LS1 engine)                                                $695

 

997-5001-60      1998-2002 F-Body Engine 4L60E Trans (LS1 engine)                                             $695

 

 

997-5101-56      1997-2004 Corvette Engine T-56 Trans (LS1/LS6 engine)                                       $695

 

997-5101-60      1997-2004 Corvette Engine 4L60E Trans (LS1/LS6 engine)                                    $695

 

 

997-5201-56      2005 Corvette Engine T-56 Trans (LS2 engine)                                                       $795

 

997-5201-60      2005 Corvette Engine 4L60E Trans (LS2 engine)                                                    $795

 

 

997-5301-56      2004 GTO Engine T-56 Trans (LS1 engine)                                                             $695

 

997-5301-60      2004 GTO Engine 4L60E Trans (LS1 engine)                                                          $695

 

 

997-5401-56      2005-2007 GTO Engine T-56 Trans (LS2 engine)                                                    $795

 

997-5401-60      2005-2007 GTO Engine 4L60E Trans (LS2 engine)                                                 $795

 

 

997-5501-56      2004-2005 Cadillac CTS-V Engine T-56 Trans (LS6 engine)                                   $695

 

997-5501-60      2004-2005 Cadillac CTS-V Engine 4L60E Trans (LS6 engine)                                $695

 

Gen 4 Car Engines Converting to Mechanical Throttle Body & Gen 3 (24x PCM)

These harnesses kits include the main harness and any adapters needed for your application. They are made to work with a cable throttle body, 12200411 or 93544896 PCMs, and MR Part #997-9101-00 O2 Sensors.

 

997-5601-56      2006-2007 Corvette Engine T-56 Trans (LS2 engine)                                              $795

 

997-5601-60      2006-2007 Corvette Engine 4L60E Trans (LS2 engine)                                           $795

 

 

997-5701-56      2008-2013 Corvette, 2010-2015 Camaro, 2017-2017 Chevrolet SS, 2008-2009 Pontiac G8

                           2011-2017 Caprice, or LS3 Crate Engine with T-56 Trans (LS3 Engine)                 $795

 

997-5701-60      2008-2013 Corvette, 2010-2015 Camaro, 2017-2017 Chevrolet SS, 2008-2009 Pontiac G8

                           2011-2017 Caprice, or LS3 Crate Engine with 4L60E Trans (LS3 Engine)              $795

 

Gen 3 (24x) Truck Engines

These harnesses kits include the main harness and any adapters needed for your application. They are made to work with a cable throttle body, 12200411 or 93544896 PCMs, and MR Part #997-9100-00 O2 Sensors.

 

997-6001-56      1999-2006 TRUCK Engines and T-56 Trans (NON Flex-Fuel)                                 $695

 

997-6001-60      1999-2006 TRUCK Engines and 4L60E Trans (NON Flex-Fuel)                              $695

 

997-6001-80      1999-2006 TRUCK Engines and 4L80E Trans (NON Flex-Fuel)                              $695

 

 

997-6002-56      2002-2006 TRUCK Engines and T-56 Trans (Flex-Fuel VIN Z)                               $795

 

997-6002-60      2002-2006 TRUCK Engines and 4L60E Trans (Flex-Fuel VIN Z)                            $795

 

997-6002-80      2002-2006 TRUCK Engines and 4L80E Trans (Flex-Fuel VIN Z)                            $795

 

 

997-6003-56      2005-2006 SSR, 2005-2006 Trailblazer, 2005-2006 GMC Envoy, 2005-2006 Isuzu Ascender

                           2005-2007 Saab 97-X with T-56 Trans                                                                    $795

 

997-6003-60      2005-2006 SSR, 2005-2006 Trailblazer, 2005-2006 GMC Envoy, 2005-2006 Isuzu Ascender

                           2005-2007 Saab 97-X with 4L60E Trans                                                                 $795

 

997-6003-80      2005-2006 SSR, 2005-2006 Trailblazer, 2005-2006 GMC Envoy, 2005-2006 Isuzu Ascender

                           2005-2007 Saab 97-X with 4L80E Trans                                                                 $795

 

Gen 4 Truck Engines Converting to Mechanical Throttle Body & Gen 3 (24x PCM)

These harnesses kits include the main harness and any adapters needed for your application. They are made to work with a cable throttle body, 12200411 or 93544896 PCMs, and MR Part #997-9100-00 O2 Sensors and MR Part #997-9200-10 MAF Sensor.

 

997-6004-56      2007-2013 TRUCK Engines and T-56 Trans (DOD Delete)                                     $795

 

997-6004-60      2007-2013 TRUCK Engines and 4L60E Trans (DOD Delete)                                  $795

 

997-6004-80      2007-2013 TRUCK Engines and 4L80E Trans (DOD Delete)                                  $795

 

 

 

Gen 4 Truck Engines (58x)

This harness kit include the main harness and any adapters needed for your application. They are made to work with 12597121, 12612384 or 12625455 ECMs, and MR Part #997-9103-00 O2 Sensors and MR Part #997-9200-30 MAF Sensor.

 

997-6105-89      2007-2013 Truck Engines and 6L80E Trans (Setup for VVT)                                  $795

 

Custom Wiring Harnesses with Ready to Run Re-flashed Computer

This complete wiring and computer package is the easiest way to get your project on the road. What you get is a new wiring harness that includes everything you need, but none of the unnecessary stuff that is in your factory harness. They’re made with XLP heat and fire resistant wire and new OEM connectors. They include the OBD2 diagnostic/tuning port and a weatherproof fuse relay panel with diagram. The woven nylon covering is much better looking, easier to route, and will not wear on other components like factory convoluted tubing. Also included is an OE engine control module that has been re-flashed to remove all of the unnecessary elements like vehicle anti-theft control and secondary O2 sensors. It is then tuned for a stock to mild camshaft with shift points to work for most builds. If you are running a strange combo or a large camshaft your final tune can be made by a local tuner or you can email us the specs and we can program it before it is shipped out. Everything is tested on a running engine before it leaves. Just plug it in and start enjoying your new LS.

The harness kits are separated into two groups, Gen 3 with 24 tooth and Gen 4 with 58 tooth reluctor ring. Then grouped by car or truck engine and cable or electric throttle body. To help identify what reluctor ring you have see our Reluctor Ring Identification below.

ATTENTION*

*Our Custom Harness and Computer packages currently have a 12-14 week lead time.

Waterproof fuse and relay box allows for mounting anywhere.

All connectors are clearly marked for ease of installation and maintenance.

LS Series Gen 3 Harness and PCM 24x

Includes new harness and re-flashed PCM (powertrain control module).

 

997-1501-56              Car Engine - Cable TB - Man Trans                      $1095.00

 

997-1501-60              Car Engine - Cable TB - 4L60E                             $1195.00

 

997-1501-80              Car Engine - Cable TB - 4L80E                             $1195.00

 

 

997-1601-56              Truck Engine - Cable TB - Man Trans                   $1095.00

 

997-1601-60              Truck Engine - Cable TB - 4L60E                         $1195.00

 

997-1601-80              Truck Engine - Cable TB - 4L80E                         $1195.00

 

 

997-1701-56              Corvette/CTS-V - TB by Wire - Man Trans            $1295.00

 

997-1701-60              Corvette/CTS-V - TB by Wire - 4L60E                   $1295.00

 

997-1701-80              Corvette/CTS-V - TB by Wire - 4L80E                   $1295.00

 

 

997-1702-56              05-07 GTO - TB by Wire - Man Trans                   $1495.00

 

997-1702-60              05-07 GTO - TB by Wire - 4L60E                          $1495.00

 

997-1702-80              05-07 GTO - TB by Wire - 4L80E                          $1495.00

 

 

997-1801-56              Truck Engine - TB by Wire -Man Trans                $1295.00

 

997-1801-60              Truck Engine - TB by Wire - 4L60E                       $1295.00

 

997-1801-80              Truck Engine - TB by Wire - 4L80E                       $1295.00

Woven covering looks and performs better than factory convoluted tubing.

Note:

For anything other than near stock applications contact us at the link below with all of you combinations specs. Include your order number with your email. There is an up-charge for Supercharged and highly modified combinations.

Gen 4 systems use a Engine Control Module and separate Transmission Control Module

 

6L80E/6L90E transmissions have the TCM built into transmission valve body. Please call to coordinate re-flashing of your existing TCM.

LS Series Gen 4 Harness and ECM 58x

Includes new harness, re-flashed ECM (engine control module) and re-flashed TCM (transmission control module) - Except 6L80E/6L90E which has the TCM built into transmission valve body. Please call to coordinate re-flashing of your existing TCM.

 

997-2601-56              Car Engine - TB by Wire - Man Trans                   $1,449.00

 

997-2601-60              Car Engine - TB by Wire - 4L60E                          $1,540.00

 

997-2601-80              Car Engine - TB by Wire - 4L80E                          $1,540.00

 

997-2601-89              Car Engine - TB by Wire - 6L80E/6L90E              $1,682.00

 

 

997-2801-56              Truck Engine - TB by Wire - Man Trans                $1,449.00

 

997-2801-60              Truck Engine - TB by Wire - 4L60E                       $1,540.00

 

997-2801-80              Truck Engine - TB by Wire - 4L80E                       $1,540.00

 

997-2801-89              Truck Engine - TB by Wire - 6L80E/6L90E            $1,682.00

Reluctor Ring Identification

The reluctor ring is a wheel on the crankshaft that tells the computer where in the revolution the crankshaft is. The earlier systems used 24 pulses per revolution and the later used 58. As a general rule 2005 and earlier engines use the 24 tooth and 2008 and later used the 58 tooth reluctor. As with most GM changes this change was started with the Corvette and took a few years before it was incorporated into all LS engines. So if you have an engine close to these years you will want to check to verify which you have. The best way to ID what reluctor ring you have is to look at the color of the crank position sensor plug just above the starter. Black is the early 24 pulse sensor and gray is the 58 pulse sensor.

Gen 3 or Gen 4?

Early and late crank position sensor plugs

Black = 24x

Gray = 58x

O2 Sensors

O2 sensors to go along with our wiring harnesses. The 24 tooth sensor has a flat 4 pin connector while the 58 tooth has a square 4 pin connector.

 

997-9100-00              4-Wire O2 Sensor-24x Gen 3                                $50.00

 

997-9102-00              4-Wire O2 Sensor-58x Gen 4                                $57.00

Mas Air Sensors

24 tooth and 58 tooth Mass Air Flow sensors. The 58x card type is simply mounted inside the air cleaner intake tube.

 

997-9200-10              MAF Sensor w/IAT-ROUND-24x                           $85.00

 

997-9200-20              Removable MAF Sensor-CARD-58x                    $90.00

OE Electronic Pedal Assembly

Original equipment electronic gas pedal assembly for use with 58x wiring harnesses.

 

997-9001-00              Gen 4 58x Pedal Assembly                                   $99.00

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