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1986 corvette vats elimination process

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How to bypass the VATS (PASSKey II) system in a late model GM vehicle

Pontiac 1994-1996 Grand Prix 1992-1999 Bonneville 1993-2002 Firebird/Trans Am/Firehawk Buick 1994-1996 Regal 1992-1999 LeSabre 1991-1996 Park Avenue 1991-1996 Roadmaster Oldsmobile 1994-1997 Cutlass Supreme 1992-1999 Eighty Eight/LSS/Ninety Eight/Regency 1991-1996 Custom Cruiser Wagon Chevrolet 1995-1999 Monte Carlo 1995-2001 Lumina 1993-2002 Camaro 1986(?)-1996 Corvette (C4) Cadillac How to bypass the VATS system in a late model GM vehicle Bullet-Style” solderless connectors Heat Shrink Tubing Resistors of varying values (totalling the resistance measured across the key’s “pellet”) Alright, let’s begin the madness: 1. Take your DMM, set it to measure Ohms (use the 20k setting.) Measure the resistance across the pellet of the ignition key. Place one probe on the silver part of one side of the pellet, and the other probe on the other side. Write this value down. 2. Purchase a resistor or resistors that add up to the value measured in step 1. Radio Shack is a great place to go for the resistors, heat shrink tubing, and the “bullet-style” solderless connectors. 3. Take the 16 ga. wire and cut into 2 four-inch pieces. 4. Strip off approx 1/16″ of insulation off each side of both wire pieces. 5. Put your resistors together in series (or if you’re lucky and have a chip that has a resistance that matches a single resistor) and solder one wire to one end of the resistor(s) and the other wire to the other side. Example: You measure 11.72 on the 20k (k meaning kilo or 1,000) scale. The closest match is 11.801 which is a #15 “chip.” Always remember that resistors have a tolerance of 2%, meaning the resistance value of the “pellet” can be either 2% higher or 2% lower than 11.801 k ohms (11.72 falls in tolerance range.) You will want to aim for 11,801 ohms. So when you go to Radio Shack you want to pick up a 10,000 ohm (10k,) a 1,000 ohm (1k,) and an 800 ohm resistors to wire together in series to achieve the 11.801k ohm value.

1986 Ford Truck F 150 2WD Pickup Emission Maintenance Warning Module-Service Manual

EMISSION MAINTENANCE WARNING MODULE SERVICE INFORMATION ^LAMP – “EMISSIONS/CHECK ENGINE” – EMISSION MAINTENANCE WARNING MODULE – SERVICE INFORMATION LIGHT TRUCK: 1985-89 BRONCO 1985-87 BRONCO II 1985-89 ECONOLINE, F- 150, F-250, F-350 1985-88 RANGER 1986-87 AEROSTAR ISSUE: The Emission Maintenance Warning “EMW” module operates a light that is located on the instrument panel. For 1985-87 model year vehicles, the light will display the word “EMISSIONS”. For 1988-89 model year vehicles, the light will display the words “CHECK ENGINE”. When the light is lit, it is indicating that the 60,000 mile emission maintenance should be performed. After the maintenance is performed the EMW module must be reset to zero time. Another type of module is the “IMS” module. This module is not part of the light circuit and does not require maintenance. At a predetermined time, the IMS module directs the EEC IV processor to make a strategy change. A third type of module is the “COMBO” module. This module combines the functions of the IMS and the EMW modules. ACTION: Refer to the following module application charts for the specific vehicle application and location of the different types of modules. NOTE: FOR APPLICATIONS NOT LOSTED IN THE FOLLOWING MODULE APPLICATION CHARTS, THE “CHECK ENGINE” LIGHT IS CONTROLLED BY THE EEC IV PROCESSOR. THESE VEHICLES DO NOT USE THE “EMW” MODULE


The Clutch and Band Application chart provides a basis for analyzing road test results. Note that the rear clutch is applied in all forward ranges (D, 2, 1). The transmission overrunning clutch is applied in first gear (D, 2 and 1 ranges) only. The rear band is applied in 1 and R range only. Note that the overdrive clutch is applied only in fourth gear and the overdrive direct clutch and overrunning clutch are applied in all ranges except fourth gear. For example: If slippage occurs in first gear in D and 2 range but not in 1 range, the transmission overrunning clutch is faulty. Similarly, if slippage occurs in any two forward gears, the rear clutch is slipping. Applying the same method of analysis, note that the front and rear clutches are applied simultaneously only in D range third and fourth gear . If the transmission slips in third gear, either the front clutch or the rear clutch is slipping. If the transmission slips in fourth gear but not in third gear, the overdrive clutch is slipping. By selecting another gear, which does not use these clutches, the slipping unit can be determined. For example, if the transmission also slips in Reverse, the front clutch is slipping. If the transmission does not slip in Reverse, the rear clutch is slipping. If slippage occurs during the 3-4 shift or only in fourth gear , the overdrive clutch is slipping. Similarly, if the direct clutch were to fail, the transmission would lose both reverse gear and overrun braking in 2 position (manual second gear). If the transmission will not shift to fourth gear , the control switch, overdrive solenoid or related wiring may also be the problem cause. This process of elimination can be used to identify a slipping unit and check operation. Proper use of the Clutch and Band Application Chart is the key. Although road test analysis will help determine the slipping unit, the actual cause of a malfunction usually cannot be determined until hydraulic and air pressure tests are performed. Practically any condition can be caused by leaking hydraulic circuits or sticking valves.Unless a malfunction is obvious, such as no drive in D range first gear , do not disassemble the transmission. Perform the hydraulic and air pressure tests to help determine the probable cause.

1989 Chevrolet Corvette V8-350 5.7L Steering Column Service and Repair Manual

SHAFT LOCK, TURN SIGNAL CANCELLING CAM, UPPER BEARING SPRING, UPPER BEARING SEAT & INNER RACE Disassembly 1. Remove steering wheel as follows: a. Disconnect battery ground cable, then remove horn cap from steering wheel by pulling. b. Disconnect horn button wire, then remove telescope lever screws and shaft lock knob screw. c. Remove telescope adjustment lever, steering wheel nut retainer and nut. d. Remove steering wheel with a puller. 2. Remove spacer, bumper, spacer and snap ring retainer (Nos. 2, 3, 4, and 5 in Fig. 59 ). 3. Remove shaft lock retainer using lock plate compressor to depress shaft lock. 4. Remove shaft lock and carrier assembly, upper bearing spring, upper bearing seat and inner race. 5. Reverse procedure to install. TURN SIGNAL SWITCH Disassembly 1. Remove SHAFT LOCK, TURN SIGNAL CANCELLING CAM, UPPER BEARING SPRING, UPPER BEARING SEAT & INNER RACE as previously outlined. 2. Place turn signal lever to the right turn position, then remove screw and switch actuator pivot assembly (Nos. 11 and 44 in Fig. 59 ). 3. Remove the screws and the wiring protector (Nos. 10 and 45). 4. Remove turn signal switch, then gently pull wire harness through column housing shroud, column housing and lock housing cover. 5. Reverse procedure to install, noting the following: a. Torque turn signal switch screws (No. 10 in Fig. 59 ) to 27 inch lbs. and torque screw (No. 11) to 18 inch lbs. BUZZER SWITCH ASSEMBLY & STEERING COLUMN LOCK CYLINDER SET

2003 GMC Truck C 1500 P/U 2WD Engine Knocking or Lifter Noise

Engine Lubrication: All Technical Service Bulletins Engine – Knocking or Lifter Noise File In Section: 06 – Engine/Propulsion System Bulletin No.: 02-06-01-038 Date: December, 2002 TECHNICAL Subject: Engine Knock or Lifter Noise (Replace 0-Ring) Models: 2001-2002 Chevrolet Camaro 2001-2003 Chevrolet Corvette 2001-2002 Pontiac Firebird 2002-2003 Cadillac Escalade, Escalade EXT 2000-2003 Chevrolet Suburban, Tahoe 2001-2003 Chevrolet Silverado 2002-2003 Chevrolet Avalanche 2000-2003 GMC Yukon, Yukon XL 2001-2003 GMC Sierra with 4.8L, 5.3L, 5.7L or 6.0L V8 Engine (VINs V, T, Z, G, S, N, U – RPOs LR4, LM7, L59, LS1, LS6, LQ9, LQ4) Condition Some customers may comment on an engine tick noise. The distinguishing characteristic of this condition is that it likely will have been present since new, and is typically noticed within the first 161-322 km (100-200 mi). The noise may often be diagnosed as a collapsed lifter . Additionally, the noise may be present at cold start and appear to diminish and then return as the engine warms to operating temperature. This noise is different from other noises that may begin to occur at 3219-4828 km (2000-3000 mi). Cause The 0-ring seal between the oil pump screen and the oil pump may be cut, causing aeration of the oil. Correction