you dont say what area your from , so we wont know if truck has rust , but as Cam said 8900.00 is a high price for that year of truck, if you live in desert area like i do , you can find them for less money, but it your money and possibly your tuck.
last yr i replace everything from steering box down including suspension it was a big job , cost around 1000.00 in parts (all moog) and took a full weekend , but i live out west and dont have to deal with rust issues
Your Vehicle: 1998 GMC Truck K 1500 Truck 4WD V8-5.7L VIN R Vehicle » A L L Diagnostic Trouble Codes ( DTC ) » Testing and Inspection » P Code Charts » P0719 P0719 Diagnostic Chart Diagnostic Chart Wiring Diagram CIRCUIT DESCRIPTION The brake switch indicates brake pedal status to the Vehicle Control Module (VCM). The brake switch is a normally-closed switch that supplies battery voltage on circuit 420 to the VCM. Applying the brake pedal opens the switch, interrupting voltage to the VCM. When the brake pedal is released, the VCM receives a constant voltage signal. If the VCM receives a zero voltage signal at the brake switch input, and the Torque Converter Clutch (TCC) is engaged, the VCM de-energizes the Torque Converter Clutch Solenoid Valve (TCC Sol. Valve). The VCM disregards the brake switch input for TCC scheduling if there is a brake switch circuit fault (Refer to Diagnostic Aids). When the VCM detects an open brake switch circuit (0 volts, low input) during accelerations, then DTC P0719 sets. DTC P0719 is a type D DTC. CONDITIONS FOR SETTING THE DTC No Vehicle Speed Sensor Assemply (VSS Assy.) DTCs P0502 or P0503. The VCM detects an open brake switch or circuit (0 volts) for 15 minutes without changing for 2 seconds, and the following events occur seven consecutive times: The vehicle speed is less than 8 km/h (5 mph); then the vehicle speed is 8-32 km/h (5-20 mph) for 4 seconds; then the vehicle speed is greater than 32 km/h (20 mph) for 6 seconds. ACTION TAKEN WHEN THE DTC SETS The VCM does not illuminate the Malfunction Indicator Lamp (MIL). DTC P0719 stores in VCM history. CONDITIONS FOR CLEARING THE DTC A scan tool can clear the DTC from the VCM history. The VCM clears the DTC from the VCM history if the vehicle completes 40 warm-up cycles without a failure reported. The VCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the VCM. DIAGNOSTIC AIDS Inspect the wiring at the VCM, the brake switch connector and all other circuit connecting points for the following conditions: A bent terminal A backed out terminal A damaged terminal Poor terminal tension A chafed wire A broken wire inside the insulation Moisture intrusion Corrosion When diagnosing for an intermittent short or open condition, massage the wiring harness while watching the test equipment for a change. If the VCM detects a brake switch fault, then the brake switch input is disregarded for TCC scheduling. The VCM then uses throttle position and vehicle speed to determine TCC application and release. Use of these inputs may result in a noticeable harsh apply or abrupt release of the TCC. Ask about the customer's driving habits. Ask about unusual driving conditions (e.g. stop and go, expressway, etc.). Inspect the brake switch for proper mounting and adjustment. TEST DESCRIPTION The numbers below refer to the step numbers on the diagnostic table. This step isolates the brake switch as a source for setting the DTC.
DTC P1870 sets if the following conditions are met for three TCC cycles with reported excessive TCC slip conditions, two consecutive times. No TP DTCs P0122 or P0123 No VSS Assy. DTC P0502 No TFT Sensor DTCs P0712 or P0713 No TCC Sol. Valve DTC P0740 No 1-2 SS Valve DTCs P0751 or P0753 No 2-3 SS Valve DTCs P0756 or P0758 No TFP Val. Position Sw. DTC P1810 No TCC PWM Sol. Valve DTC P1860 The engine speed is greater than 450 RPM for 8 seconds. Not in fuel cutoff. The engine torque is 50-450 lb ft. The gear range is D4. Not in 1st gear. The TP angle is 9-35%. The TFT is 20-130°C (68-266°F). The TCC is ON for 5 seconds. The TCC is at maximum apply for 5 seconds. The TCC slip speed is greater than 130 RPM. All conditions met for 7 seconds Action Taken When the DTC Sets The VCM inhibits TCC engagement. The VCM commands maximum line pressure. The VCM inhibits 4th gear if the transmission is in hot mode. The VCM freezes shift adapts from being updated. The VCM illuminates the Malfunction Indicator Lamp (MIL).
Remove the oil level indicator tube. Raise the vehicle. Remove the engine oil and the engine oil filter. Remove the oil filter adapter. Remove the starter. Remove the flywheel inspection cover. Remove the engine mount through bolts. Raise and support the engine.
contact ivan at pine hollow auto diagnostics in state college , pa. or try eric at south main auto in avoca , n.y. , both have youtube channels and are great at elect problems
you might have the wrong gearing in differential for towing in mountains
check tire balance , and alignment
make sure your m-12x1.75 is just that, got two from different stores and both too big , i wanted to remove the aftermarket valve type drain on my 5.7 and i couldn't because new plugs were too big , got out my bolt sizer and both were 14 mm
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