Answer by  
                                                                                          Rachel411 (468)
                                                            
                          
                          
                                                          The 2001 Alero was available with two different engines.  The base GX and GL4 models came with a 150hp, 2.4 liter, four cylendar.  The GL1 and GL2 could have either engine.  The GLX came standard with the 170-hp, 3.4 liter V-6.