Most Crank No Start Conditions Are The Result Of Many Factors Including, Bad Sensor, PCM Programming, Improper Wiring Installation. Please Use This As A Checklist To Help Remedy Your Problem.

• Fuel Pressure Is 58-62 PSI (Gen 3/4) And 75-80 PSI (Gen 5)
• Spark Present At Plug
• Injectors Have Signal Commonly Tested Using A Noid Light
• Injectors Aren’t Gummed Up From Prolonged Sitting
• PCM Has VATS Deleted
• DTCs Present
• Vehicle And Engine Properly Grounded. Cylinder Heads Are OK To Ground Your Harness As Long As A Ground Strap Is Placed To Cylinder Head As Well.

Gen 3 Engines: Factory ECM Tach Settings Must Be Changed From A Factory 4 Cylinder Mode To The Correct Setting For Your Tachometer. If The Original Engine Was A 4 Cylinder No Change Is Needed, If 6 Cylinder Must Change From 6 to 4 In Settings, If 8 Cylinder Must Change From 6 to 3 In Settings. A Pullup Resistor Must Be Added As Well For Drive By Wire Applications Only.

Gen 4 Engines: Factory ECM Tach Settings Must Be Changed. For Most 8 Cylinder Gauges Initial Settings Of Type: Crank, High Resolution 7 and Low Resolution 8 Will Usually Do The Trick In Some Applications The High And Low Resolution Can Be Increased Or Decreased To Get A Spot On Accurate Tach.

GEN 3/ GEN 4 OIL PRESSURE SENSOR: PART NO: DELCO D1818A

GEN 3/ GEN 4 COOLANT TEMPERATURE SENSOR: PART NO: STANDARD TX111

GEN 3 DRIVE BY CABLE OXYGEN SENSOR: PART NO: BOSCH 13444

GEN 3 DRIVE BY WIRE OXYGEN SENSOR: PART NO: BOSCH 15284

How To Connect The Loose Speedometer Wire. Locate The White DRAC/VSSB Buffer Box And Disconnect Plugs. Follow Wiring Below For Your Specific Year:

88-94 Models: Locate The Lt. Blue/Black Wire In The 9 Pin Plug And The Red/White Wire In The 4 Pin Plug. Tie Both Wires Together To Speedometer Wire. (Red/White Is Only Needed If Retaining Cruise Control)

95 Models: Locate The Dk. Green/White Wire In Position 14 And The Dk. Green Wire In Position 15. Tie Both Wires Together To Speedometer Wire. (Dk. Green/White Is Only Needed If Retaining Cruise Control)

A U0107 Diagnostic Trouble Code Is Very Common In Drive By Wire Gen 3 Swaps. This Code Is Most Commonly Thrown When Components Of The Drive By Wire Throttle System Are Mismatched (i.e. PCM/TAC Module/Pedal) Please Confirm PCM Year Calibration Is Correct To Exact Year Of TAC Module And Pedal.

If you have purchased one of our custom plug and play or integrated harnesses please use the address below to send your original harness to. Please write order number visibly on outside of box.

4213 N. Frazier St. Ste E3; Conroe, TX 77303

To check on status of your order please email info@texaswiringspecialist.com with order number. If you order is not within a week or 2 of lead time please do not send an email as we will not have any shipping information assigned to order yet.

All Harnesses Manufactured By Texas Wiring Specialist Come With A 2 Year Warranty. All Other Products Will Carry Manufacturers Warranty And Must Be Submitted To Manufacturer