i 've a 97 tahoe 1500 5.7 Vortex speedodomer stop working also rpm gauge and tranny want shift down it stays in 3rd or overdrive is making a skipping sound at times what's up ? drives fine no slipping in any gear
drove to work about 35 miles it sat for 8 hrs i went out started it and started to pull off notice it being sluggish then i notice that my speedodomer had stop working and RPM gauge too and the marker on the dash for gear selection was also out after a bit i relized it was not downshifting at low or high speeds i drove it home and back to work the next day it will go in d1 ,d2 and d3 if you manully shift , it does make a sputtering sound occasionly.