Why is my1998 Catera stuck in 1st gear?

Your 1998 Catera may be stuck in 1st gear due to a few potential issues, such as a malfunctioning transmission control module, low Transmission Fluid levels, or a problem with the shift linkage. Additionally, a faulty sensor or a mechanical failure within the transmission itself could also prevent it from shifting properly. It's advisable to have a professional diagnose the issue to determine the exact cause and necessary repairs.