Having problems with your 1998 GMC Sierra ?
GMC pickups I have a '99 and a 2006 GMC with the same engine (5.3L ), transmission, and rear differential (373). The trucks pull my boat very differently. The 2006 does not have the power the 99 displays on the hills we travel. The 2006 has to shift down more often, scream up to 5,000 rpm to gain speed back, shift up, loose speed and go thru the process again. Local Chev dealer cannot find any problems with the ' 06. ??? What can I do within the warranty to improve the '06 ??
1-2 Shift @ +/- 250 RPM Output Shaft Speed\015\0122-3 Shift @ +/- 200 RPM Output Shaft Speed\015\0123-4 Shift @ +/- 150 RPM Output Shaft Speed\015\012\015\012% of TPS\015\01212\015\01225\015\01250\015\01212\015\01225\015\01250\015\01212\015\01225\015\01250\015\012\015\0121999\015\0123.73\015\012454\015\012599\015\0121012\015\012826\015\0121053\015\0121652\015\0121198\015\0121549\015\0122499\015\012\015\0122006\015\0123.73\015\012391\015\012568\015\012960\015\012705\015\012940\015\0121568\015\0121000\015\0121391\015\0122370
Repair Help & Product Troubleshooting for 1998 GMC Sierra
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