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Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination)

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2000-2002 Buick Century, Regal 2000-2001 Chevrolet Lumina 2000-2002 Chevrolet Impala, Monte Carlo 2000-2002 Pontiac Grand Prix 2000-2002 Oldsmobile Intrigue 1. Verify that the coolant is at proper level in the radiator and the coolant recovery bottle. If the coolant is low, add proper amount of 50/50 water and DEX-COOL® mixture. If the low coolant light operates properly, diagnose the cooling system for loss of coolant as outlined in SI. DO NOT proceed further with this bulletin. 2. Remove the low coolant level sensor. Refer to Coolant Level Module Replacement in the Engine Cooling sub-section. 3. With the key on, the engine off and the coolant level sensor disconnected from the vehicle wiring harness, observe the low coolant light: Subject: Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination) Models: 2000-2002 Buick Century, Regal 2000-2001 Chevrolet Lumina 2000-2002 Chevrolet Impala, Monte Carlo 2000-2002 Pontiac Grand Prix 2000-2002 Oldsmobile Intrigue • Light is on — Chassis wiring or instrument cluster concern. Follow the appropriate diagnostic information in SI. • 4. With the key off, connect the coolant level sensor into the vehicle’s wiring harness. Connect a ground wire (1) to the battery negative terminal. Using a sharp probe (3) attached to the ground wire, ground the coolant sensor probe (2) as shown in the illustration. Make sure a good contact is made. With the key on and the engine off, observe the low coolant light for at least 15 seconds. 5. Using a small wire brush or emery cloth, polish the low coolant level sensor probe to remove any film or oxidation. The probe should be a bright brass color when finished. Use Brake Parts Cleaner to flush removed deposits from the low coolant sensor probe. Reinstall the low coolant sensor into the vehicle and proceed to Step 6. 6. Flush the cooling system and install new DEX-COOL® mixture as outlined in the SI. Check the vehicle’s warranty history to determine if any engine gasket had recently been changed. If there has not been a recent gasket replacement, locate and repair the source of the engine oil contamination

1999 Saturn SL1 L4-1.9L SOHC VIN 8 Engine – Driveability Concerns/ Cooling System DTC’s Set

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1. Disconnect engine coolant temperature sensor electrical connector and inspect sensor and connector terminals for corrosion and/or evidence of engine coolant. ^If terminals are corroded or if there is evidence of engine coolant proceed to step 4. ^If terminals are not corroded and there is no evidence of engine coolant, reconnect the electrical connector and continue to next step. 2. Perform one or both of the following checks to determine whether the engine coolant temperature sensor is providing the correct temperature indication. If engine coolant temperature sensor reading does not pass either of the above tests, continue with next step. ^If engine is at ambient temperature (vehicle has been sitting overnight or not started for several hours), use a Scan tool to compare the inlet air temperature ( IAT ) to the engine coolant temperature ( ECT ). These two readings should be within 2°C (4°F) of each other. ^If engine is at operating temperature, install a thermometer in the coolant recovery reservoir. With the engine running and A/C off, use a Scan tool to compare the engine coolant temperature sensor reading to the thermometer reading. These two readings should be within 8°C (15°F) of each other If engine coolant temperature sensor reading passes both of the tests above, refer to appropriate symptom diagnostic chart in the Engine/Emissions Controls Section of applicable Engine Service Manual. 3. Turn ignition off. 4Remove coolant surge tank cap. 5. Drain at least 1.9 L (2 Qt.) of engine coolant from the cooling system by opening radiator drain valve or removing engine drain plug. Collect engine coolant in a container. 6. Disconnect engine coolant temperature sensor electrical connector. 7. Remove engine coolant temperature sensor from cylinder head. 8. Obtain replacement engine coolant temperature sensor (P/N 21025106). 9. Use appropriate tap to clean sensor mounting hole of any thread sealant residue. 10. Install engine coolant temperature sensor in cylinder head. Torque: Engine Coolant Temperature Sensor: 8 Nm (71 in-lbs) 11. Inspect harness connector terminals for corrosion and/or evidence of engine coolant. If harness connector terminals are corroded or there is evidence of engine coolant, the harness connector must be replaced with new connector (P/N 12117087-includes: connector, terminals, wires, and splice sleeves). 12. Connect engine coolant temperature sensor connector. 13. Transfer engine coolant drained in step 5 into coolant surge tank. If necessary fill coolant surge tank to the FULL COLD range with 50/50 solution of correct type of antifreeze and clean water. 14. Start engine and check for leaks. 15. Run engine until upper radiator hose is hot, then add additional coolant if needed to bring the level to the FULL COLD level (1991-early 1997) or within the Min./Max. cold range (late l997-2001). 16. Install coolant surge tank cap.

2000 Ford Windstar INCORRECT FUEL GAUGE INDICATION Workshop Manual

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The fuel gauge does not change indication unless there has been at least 3 gallons of fuel added or deleted between ignition switch cycle. Use recorded REM and instrument cluster DTCs from the Continuous and On- Demand self-test. ? Are any DTCs recorded? Yes If REM DTC B1201 or IC DTC U1131 is retrieved, GO to D6 . No GO to D2. D2 CARRY OUT THE ICM FUEL GAUGE ACTIVE COMMAND IC Active Command Select the IC FUEL GAUGE CONTROL active command. Trigger FUELLEVEL active command. Toggle and monitor the fuel gauge while adjusting the FUELLEVEL active command to read 50% and 100% Did the fuel gauge needle start at empty (E), move to half at 50%, and full (F) at 100%? Yes GO to D3. No INSTALL a new instrument cluster; REFER to Instrument Cluster. CLEAR the DTC. REPEAT the instrument cluster self-test. D3 CHECK THE FUEL GAUGE READING Fuel Pump Module C412 Connect one lead of Instrument Gauge System Tester to fuel pump module C412 Pin 5, Circuit 1357 (LB/YE), harness side. Connect the other lead to fuel pump module C412 Pin 8, Circuit 1356 (LG/VT), harness side. Set the power switch on Instrument Gauge System Tester to the ON position Set Instrument Gauge System Tester to 15 ohms. Wait one minute. Set Instrument Gauge System Tester to 160 ohms. Wait one minute. Read the fuel gauge. The fuel gauge should read full or above. Set Instrument Gauge System Tester to 15 ohms. Wait one minute. Read the fuel gauge. The fuel gauge should read empty or below Does the fuel gauge operate correctly? Yes GO to D4. No GO to D6. D4 INSPECT THE FUEL TANK Visually inspect the fuel tank for any damage or deformation. ? Is the fuel tank OK? Yes GO to D5. No INSTALL a new fuel tank. REFER to Section 310-01. TEST the system for normal operation. D5 INSPECT THE FUEL LEVEL SENSOR AND PUMP ASSEMBLY Visually inspect the fuel pump assembly for damaged wiring or connectors. Visually inspect the float and float rod for damage or obstruction

2004-2007 Ford Explorer MIL ON WITH DTC P0463 OR ERRATIC FUEL GAUGE OPERATION SERVICE PROCEDURE

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ACTION Follow the Service Procedure steps to correct the condition. SERVICE PROCEDURE 1. For vehicles with customer symptom of erratic fuel gauge operation (with no MIL on), proceed to Step 1a. For vehicles with a customer symptom including the MIL on, proceed to Step 1b. If unable to verify the concern, do not continue with this TSB. a. Follow the appropriate pinpoint test (PPT) for “Fuel Gauge Inaccurate” in Workshop Manual (WSM), Section 413-01. If PPT test results lead to fuel pump module replacement, proceed to Step 2. If PPT test results isolate any problem other than fuel pump module replacement, repair as indicated and do not continue with this TSB. b. Install diagnostic scan tool to retrieve DTCs. If DTC P0463 is retrieved, proceed to Step 2. If DTC P0463 is not retrieved, this TSB does not apply, follow normal WSM diagnostics. 2. Remove fuel tank per WSM, Section 310-01 3. Remove fuel pump assembly from fuel tank per WSM, Section 310-01. See Figure 1 (Chart) to determine if a kit (contains a fuel level sensor assembly, a wire harness and heat shrink tube) or fuel pump assembly is required for repair. For vehicles that can be serviced with a kit go to Step 4. For vehicles that require fuel pump assembly replacement, go to Step 12. 4. Remove the fuel level sensor assembly (sender card/float rod assembly) from the fuel pump assembly per WSM, Section 310-01

4L60-E Automatic Transmission/Torque Converter Clutch (TCC) Shudder, Water in Transmission (Repair Transmission and Replace Transmission Filler Tube, Level Indicator and Seal)4L60-E Automatic Transmission/Torque Converter Clutch (TCC) Shudder, Water in Transmission (Repair Transmission and Replace Transmission Filler Tube, Level Indicator and Seal) Transmission Repair

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Transmission Repair 1. Remove the transmission. Refer to the appropriate SI procedure. 2. Disassemble and inspect the transmission. Refer to Unit Repair Automatic Transmission – 4L60-E/4L65-E. Important: Subject: 4L60-E Automatic Transmission/Torque Converter Clutch (TCC) Shudder, Water in Transmission (Repair Transmission and Replace Transmission Filler Tube, Level Indicator and Seal) Models: 2004-2005 Buick Rainier 2003-2005 Chevrolet TrailBlazer Models 2003-2005 GMC Envoy Models 2003-2004 Oldsmobile Bravada 2005 Saab 9-7X with 4.2L In-Line 6 Cylinder Engine (VIN S — RPO LL8) • Visible rust on the transmission fluid level indicator. • Visible water in the oil pan. • A milky white substance inside the pan area. • Spacer plate gaskets that appear to be glued to the spacer plate, valve body or case. • Rust on internal transmission iron/steel components. • Remove the surge tank cap and examine the coolant for signs of contamination with transmission fluid (the coolant will have a milky, not clear appearance). • If the coolant has a normal, clear appearance, the radiator should not be replaced. • The cooler can also be tested by following the Coolant System Leak Test procedure (SI Document ID# 877442). Do NOT replace a radiator without verifying that the transmission oil cooler is leaking. If water or coolant is found in the transmission, the following components MUST be replaced. Replace the Transmission Fluid Filler Tube, Seal and Fluid Level Indicator WITH the transmission REMOVED from vehicle. 1. Remove the transmission fluid filler tube from the transmission. 2. Replace the transmission fill tube seal, P/N 1259475. 3. Replace the transmission fill tube, P/N 15000220, following the appropriate SI Document for Transmission Installation. 4. Replace the transmission fluid level indicator, P/N 15069769 when appropriate during the transmission installation. Replace the Transmission Fluid Filler Tube, Seal and Fluid Level Indicator with the transmission in the vehicle. 1. Remove the air cleaner outlet duct. Refer to Air Cleaner Element Replacement (SI Document ID# 1364496). 2. Remove the transmission fluid level indicator from the filler tube. 3. Remove the filler tube nut (2) located on the right side of the engine. 4. Remove the filler tube from the vehicle. Tip It is necessary to remove the two A/C line (suction line / low side of muffler hose) retainers and reposition • Replace all of the rubber type seals. • Replace all of the composition-faced clutch plate assemblies including the band. • Replace all of the nylon parts (Thrust Washers). • Replace the torque converter. • Thoroughly clean and rebuild the transmission, using new gaskets and oil filter. • Flush and flow check the transmission oil cooler using J 45096. Refer to Corporate Bulletin Number 02-07-30- 052C or newer – Automatic Transmission Oil Cooler Flush and Flow Test Essential Tool J 45096 TransFlow .
the A/C line to allow proper clearance for installation of the new transmission fluid fill tube. 5. Remove the A/C line at the oil level indicator tube bracket nut. 6. Remove the A/C bracket bolt from the engine lift hook. 7. Reposition the A/C line upward. 8. Install the new transmission filler tube, P/N 15000220, into position but NOT into the transmission at this time. 9. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information (SI Document ID# 744862). 10. Remove the two bolts securing the transmission heat shield to the transmission. 11. Remove the transmission heat shield from the transmission. 12. Remove the old filler tube seal from the transmission case. 13. Install a new seal, P/N 1259475 into the transmission case. 14. Position the new transmission filler tube into the transmission seal. 15. Install the transmission heat shield to the transmission. 16. Install the two bolts securing the transmission heat shield to the transmission. Tighten Tighten the bolts to 17 N·m (13 lb ft). 17. Lower the vehicle. 18. Install the nut securing the filler tube to the stud. Tighten Tighten the nut to 10 N·m (89 lb in). 19. Reposition the A/C line into place. 20. Install the A/C line bracket to the oil level indicator tube stud and secure the bracket with the nut. 21. Install the A/C line bracket to the engine lift bracket and secure the A/C bracket with the bolt